{"id":436,"date":"2021-09-10T17:14:37","date_gmt":"2021-09-10T09:14:37","guid":{"rendered":"https:\/\/wp.dj47.top\/?p=436"},"modified":"2021-10-20T16:06:44","modified_gmt":"2021-10-20T08:06:44","slug":"100%e4%b8%aapython%e5%b0%8f%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/www.djlog.cn\/?p=436","title":{"rendered":"100\u4e2aPython\u5c0f\u6280\u5de7"},"content":{"rendered":"

\u258d1\u3001for\u5faa\u73af\u4e2d\u7684else\u6761\u4ef6<\/span><\/p>\n

\n

\u8fd9\u662f\u4e00\u4e2afor-else\u65b9\u6cd5\uff0c\u5faa\u73af\u904d\u5386\u5217\u8868\u65f6\u4f7f\u7528else\u8bed\u53e5\u3002<\/span><\/p>\n

\n

\u4e0b\u9762\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u6bd4\u5982\u6211\u4eec\u60f3\u68c0\u67e5\u4e00\u4e2a\u5217\u8868\u4e2d\u662f\u5426\u5305\u542b\u5947\u6570\u3002<\/span><\/p>\n

\n

\u90a3\u4e48\u53ef\u4ee5\u901a\u8fc7for\u5faa\u73af\uff0c\u904d\u5386\u67e5\u627e\u3002<\/span><\/p>\n

\n

\n

\n

\n

numbers\u00a0=\u00a0[2<\/span>,\u00a04<\/span>,\u00a06<\/span>,\u00a08<\/span>,\u00a01<\/span>]

for<\/span>\u00a0number\u00a0in<\/span>\u00a0numbers:
\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0number\u00a0%\u00a02<\/span>\u00a0==\u00a01<\/span>:
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0print(number)
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0break<\/span>
else<\/span>:
\u00a0\u00a0\u00a0\u00a0print(“No\u00a0odd\u00a0numbers”<\/span>)<\/p>\n<\/section>\n

\n

\n

\n

\u5982\u679c\u627e\u5230\u4e86\u5947\u6570\uff0c\u5c31\u4f1a\u6253\u5370\u8be5\u6570\u503c\uff0c\u5e76\u4e14\u6267\u884cbreak\u8bed\u53e5\uff0c\u8df3\u8fc7else\u8bed\u53e5\u3002<\/span><\/p>\n

\n

\u6ca1\u6709\u7684\u8bdd\uff0c\u5c31\u4e0d\u4f1a\u6267\u884cbreak\u8bed\u53e5\uff0c\u800c\u662f\u6267\u884celse\u8bed\u53e5\u3002<\/span><\/p>\n

\n

\n

\u258d2\u3001\u4ece\u5217\u8868\u4e2d\u83b7\u53d6\u5143\u7d20\uff0c\u5b9a\u4e49\u591a\u4e2a\u53d8\u91cf<\/span><\/p>\n

\n

\n

\n

\n

my_list\u00a0=\u00a0[1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>,\u00a05<\/span>]
one,\u00a0two,\u00a0three,\u00a0four,\u00a0five\u00a0=\u00a0my_list<\/p>\n<\/section>\n

\n

\n

\n

\n

\u258d3\u3001\u4f7f\u7528heapq\u6a21\u5757\uff0c\u83b7\u53d6\u5217\u8868\u4e2dn\u4e2a\u6700\u5927\u6216\u6700\u5c0f\u7684\u5143\u7d20<\/span><\/span><\/p>\n

\n

\n

\n

\n

import<\/span>\u00a0heapq

scores\u00a0=\u00a0[51<\/span>,\u00a033<\/span>,\u00a064<\/span>,\u00a087<\/span>,\u00a091<\/span>,\u00a075<\/span>,\u00a015<\/span>,\u00a049<\/span>,\u00a033<\/span>,\u00a082<\/span>]

print(heapq.nlargest(3<\/span>,\u00a0scores))\u00a0\u00a0#\u00a0[91,\u00a087,\u00a082]<\/span>
print(heapq.nsmallest(5<\/span>,\u00a0scores))\u00a0\u00a0#\u00a0[15,\u00a033,\u00a033,\u00a049,\u00a051]<\/span><\/p>\n<\/section>\n

\n

\n

\n

\n

\u258d4\u3001\u5c06\u5217\u8868\u4e2d\u7684\u6240\u6709\u5143\u7d20\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u51fd\u6570<\/span><\/span><\/p>\n

\n

\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 * \u53f7\uff0c\u63d0\u53d6\u5217\u8868\u4e2d\u6240\u6709\u7684\u5143\u7d20<\/span><\/p>\n

\n

\n

\n

\n

my_list\u00a0=\u00a0[1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>]

print(my_list)\u00a0\u00a0#\u00a0[1,\u00a02,\u00a03,\u00a04]<\/span>
print(*my_list)\u00a0\u00a0#\u00a01\u00a02\u00a03\u00a04<\/span><\/p>\n<\/section>\n

\n

\n

\n

\u5982\u6b64\u4fbf\u53ef\u4ee5\u5c06\u5217\u8868\u4e2d\u7684\u6240\u6709\u5143\u7d20\uff0c\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u51fd\u6570<\/span><\/p>\n

\n

\n

\n

\n

def<\/span>\u00a0sum_of_elements<\/span>(*arg)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0total\u00a0=\u00a00<\/span>
\u00a0\u00a0\u00a0\u00a0for<\/span>\u00a0i\u00a0in<\/span>\u00a0arg:
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0total\u00a0+=\u00a0i

\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0total


result\u00a0=\u00a0sum_of_elements(*[1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>])
print(result)\u00a0\u00a0#\u00a010<\/span><\/p>\n<\/section>\n

\n

\n

\n

\n

\u258d5\u3001\u83b7\u53d6\u5217\u8868\u7684\u6240\u6709\u4e2d\u95f4\u5143\u7d20<\/span><\/span><\/p>\n

\n

\n

\n

\n

_,\u00a0*elements_in_the_middle,\u00a0_\u00a0=\u00a0[1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>,\u00a05<\/span>,\u00a06<\/span>,\u00a07<\/span>,\u00a08<\/span>]
print(elements_in_the_middle)\u00a0\u00a0#\u00a0[2,\u00a03,\u00a04,\u00a05,\u00a06,\u00a07]<\/span><\/p>\n<\/section>\n

\n

\n

\n

\n

\u258d6\u3001<\/span>\u4f7f\u7528\u4e00\u884c\u4ee3\u7801\u8d4b\u503c\u591a\u4e2a\u53d8\u91cf<\/span><\/span><\/p>\n

\n

\n

\n

\n
one,\u00a0two,\u00a0three,\u00a0four\u00a0=\u00a01,\u00a02,\u00a03,\u00a04<\/pre>\n<\/section>\n
\n
\n
\n
\n
\u258d7\u3001\u5217\u8868\u63a8\u5bfc\u5f0f<\/span><\/span><\/p>\n
\n
\u53ea\u7528\u4e00\u884c\u4ee3\u7801\uff0c\u4fbf\u53ef\u5b8c\u6210\u5bf9\u6570\u7ec4\u7684\u8fed\u4ee3\u4ee5\u53ca\u8fd0\u7b97\u3002<\/span><\/p>\n
\n
\u6bd4\u5982\uff0c\u5c06\u5217\u8868\u4e2d\u7684\u6bcf\u4e2a\u6570\u5b57\u63d0\u9ad8\u4e00\u500d\u3002<\/span><\/p>\n
\n
\n
\n
\n
numbers\u00a0=\u00a0[1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>,\u00a05<\/span>]
squared_numbers\u00a0=\u00a0[num\u00a0*\u00a0num\u00a0for<\/span>\u00a0num\u00a0in<\/span>\u00a0numbers]

print(squared_numbers)\u00a0#\u00a0[1,\u00a04,\u00a09,\u00a016,\u00a025]<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u63a8\u5bfc\u5f0f\u4e0d\u4ec5\u5217\u8868\u80fd\u7528\uff0c\u5b57\u5178\u3001\u96c6\u5408\u3001\u751f\u6210\u5668\u4e5f\u80fd\u4f7f\u7528\u3002
<\/span><\/p>\n
\n
\u4e0b\u9762\u770b\u4e00\u4e0b\uff0c\u4f7f\u7528\u5b57\u5178\u63a8\u5bfc\u5f0f\uff0c\u5c06\u5b57\u5178\u7684\u503c\u63d0\u9ad8\u4e00\u500d\u3002<\/span><\/p>\n
\n
\n
\n
\n
dictionary\u00a0=\u00a0{‘a’<\/span>:\u00a04<\/span>,\u00a0‘b’<\/span>:\u00a05<\/span>}
squared_dictionary\u00a0=\u00a0{key:\u00a0num\u00a0*\u00a0num\u00a0for<\/span>\u00a0(key,\u00a0num)\u00a0in<\/span>\u00a0dictionary.items()}

print(squared_dictionary)\u00a0\u00a0#\u00a0{‘a’:\u00a016,\u00a0‘b’:\u00a025}<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d8\u3001\u901a\u8fc7Enum\u679a\u4e3e\u540c\u4e00\u6807\u7b7e\u6216\u4e00\u7cfb\u5217\u5e38\u91cf\u7684\u96c6\u5408<\/span><\/span><\/p>\n
\n
\u679a\u4e3e\u662f\u7ed1\u5b9a\u5230\u552f\u4e00\u7684\u5e38\u91cf\u503c\u7684\u4e00\u7ec4\u7b26\u53f7\u540d\u79f0(\u6210\u5458)\u3002<\/span><\/p>\n
\n
\u5728\u679a\u4e3e\u4e2d\uff0c\u6210\u5458\u53ef\u4ee5\u901a\u8fc7\u8eab\u4efd\u8fdb\u884c\u6bd4\u8f83\uff0c\u679a\u4e3e\u672c\u8eab\u53ef\u4ee5\u8fed\u4ee3\u3002<\/span><\/p>\n
\n
\n
\n
\n
from<\/span>\u00a0enum\u00a0import<\/span>\u00a0Enum


class<\/span>\u00a0Status<\/span>(Enum)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0NO_STATUS\u00a0=\u00a0-1<\/span>
\u00a0\u00a0\u00a0\u00a0NOT_STARTED\u00a0=\u00a00<\/span>
\u00a0\u00a0\u00a0\u00a0IN_PROGRESS\u00a0=\u00a01<\/span>
\u00a0\u00a0\u00a0\u00a0COMPLETED\u00a0=\u00a02<\/span>


print(Status.IN_PROGRESS.name)\u00a0\u00a0#\u00a0IN_PROGRESS<\/span>
print(Status.COMPLETED.value)\u00a0\u00a0#\u00a02<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d9\u3001<\/span>\u91cd\u590d\u5b57\u7b26\u4e32<\/span><\/span><\/p>\n
\n
\n
\n
\n
name\u00a0=\u00a0“Banana”<\/span>
print(name\u00a0*\u00a04<\/span>)\u00a0\u00a0#\u00a0BananaBananaBananaBanana<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d10\u3001\u6bd4\u8f833\u4e2a\u6570\u5b57\u7684\u5927\u5c0f<\/span><\/span><\/p>\n
\n
\u5982\u679c\u60f3\u6bd4\u8f83\u4e00\u4e2a\u503c\u548c\u5176\u4ed6\u4e24\u4e2a\u503c\u7684\u5927\u5c0f\u60c5\u51b5\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u7b80\u5355\u7684\u6570\u5b66\u8868\u8fbe\u5f0f\u3002<\/span><\/p>\n
\n
\n
\n
\n
1<\/span>\u00a0<\u00a0x\u00a0<\u00a010<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u8fd9\u4e2a\u662f\u6700\u7b80\u5355\u7684\u4ee3\u6570\u8868\u8fbe\u5f0f\uff0c\u5728Python\u4e2d\u4e5f\u662f\u53ef\u4ee5\u4f7f\u7528\u7684\u3002<\/span><\/p>\n
\n
\n
\n
\n
x\u00a0=\u00a03<\/span>

print(1<\/span>\u00a0<\u00a0x\u00a0<\u00a010<\/span>)\u00a0\u00a0#\u00a0True<\/span>
print(1<\/span>\u00a0<\u00a0x\u00a0and<\/span>\u00a0x\u00a0<\u00a010<\/span>)\u00a0\u00a0#\u00a0True<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d11\u3001\u4f7f\u75281\u884c\u4ee3\u7801\u5408\u5e76\u5b57\u5178<\/span><\/span><\/p>\n
\n
\n
\n
\n
first_dictionary\u00a0=\u00a0{‘name’<\/span>:\u00a0‘Fan’<\/span>,\u00a0‘location’<\/span>:\u00a0‘Guangzhou’<\/span>}
second_dictionary\u00a0=\u00a0{‘name’<\/span>:\u00a0‘Fan’<\/span>,\u00a0‘surname’<\/span>:\u00a0‘Xiao’<\/span>,\u00a0‘location’<\/span>:\u00a0‘Guangdong,\u00a0G<\/span>uang<\/span>zhou<\/span>‘<\/span>}

result\u00a0=\u00a0first_dictionary\u00a0|\u00a0second_dictionary

print(result)
#\u00a0{‘name’:\u00a0‘Fan’,\u00a0‘location’:\u00a0‘Guangdong,\u00a0Guangzhou’,\u00a0‘surname’:\u00a0‘Xiao’}<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d12\u3001\u67e5\u627e\u5143\u7ec4\u4e2d\u5143\u7d20\u7684\u7d22\u5f15<\/span><\/span><\/p>\n
\n
\n
\n
\n
books\u00a0=\u00a0(‘Atomic\u00a0habits’<\/span>,\u00a0‘Ego\u00a0is\u00a0the\u00a0enemy’<\/span>,\u00a0‘Outliers’<\/span>,\u00a0‘Mastery’<\/span>)

print(books.index(‘Mastery’<\/span>))\u00a0\u00a0\u00a0#\u00a03<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d13\u3001\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\u5217\u8868<\/span><\/span><\/p>\n
\n
\u5047\u8bbe\u4f60\u5728\u51fd\u6570\u4e2d\u83b7\u5f97\u8f93\u51fa\uff0c\u539f\u672c\u5e94\u8be5\u662f\u4e00\u4e2a\u5217\u8868\uff0c\u4f46\u5b9e\u9645\u4e0a\u5374\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002<\/span><\/p>\n
\n
\n
\n
\n
input\u00a0=\u00a0\"[1,2,3]\"<\/pre>\n<\/section>\n
\n
\n
\n
\u4f60\u53ef\u80fd\u7b2c\u4e00\u65f6\u95f4\u4f1a\u60f3\u5230\u4f7f\u7528\u7d22\u5f15<\/span>\u6216\u8005<\/span>\u6b63\u5219\u8868\u8fbe\u5f0f\u3002<\/span><\/p>\n
\n
\u5b9e\u9645\u4e0a\uff0c\u4f7f\u7528ast\u6a21\u5757\u7684literal_eval\u65b9\u6cd5\u5c31\u80fd\u641e\u5b9a\u3002<\/span><\/p>\n
\n
\n
\n
\n
import<\/span>\u00a0ast


def<\/span>\u00a0string_to_list<\/span>(string)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0ast.literal_eval(string)


string\u00a0=\u00a0“[1,\u00a02,\u00a03]”<\/span>
my_list\u00a0=\u00a0string_to_list(string)
print(my_list)\u00a0\u00a0#\u00a0[1,\u00a02,\u00a03]<\/span>

string\u00a0=\u00a0“[[1,\u00a02,\u00a03],[4,\u00a05,\u00a06]]”<\/span>
my_list\u00a0=\u00a0string_to_list(string)
print(my_list)\u00a0\u00a0#\u00a0[[1,\u00a02,\u00a03],\u00a0[4,\u00a05,\u00a06]]<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d14\u3001<\/span>\u8ba1\u7b97\u4e24\u6570\u5dee\u503c<\/span><\/span><\/p>\n
\n
\n
<\/section>\n
\u8ba1\u7b97\u51fa2\u4e2a\u6570\u5b57\u4e4b\u95f4\u7684\u5dee\u503c\u3002<\/span><\/section>\n
<\/section>\n
\n
def<\/span>\u00a0subtract<\/span>(a,\u00a0b)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0a\u00a0–\u00a0b


print((subtract(1<\/span>,\u00a03<\/span>)))\u00a0\u00a0#\u00a0-2<\/span>
print((subtract(3<\/span>,\u00a01<\/span>)))\u00a0\u00a0#\u00a02<\/span><\/p>\n<\/section>\n
<\/section>\n
\u4e0a\u9762\u7684\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u9700\u8981\u8003\u8651\u6570\u503c\u7684\u5148\u540e\u987a\u5e8f\u3002
<\/span><\/section>\n
<\/section>\n
\n
def<\/span>\u00a0subtract<\/span>(a,\u00a0b)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0a\u00a0–\u00a0b


print((subtract(a=1<\/span>,\u00a0b=3<\/span>)))\u00a0\u00a0#\u00a0-2<\/span>
print((subtract(b=3<\/span>,\u00a0a=1<\/span>)))\u00a0\u00a0#\u00a0-2<\/span><\/p>\n<\/section>\n
<\/section>\n
\u4f7f\u7528\u547d\u540d\u53c2\u6570\uff0c\u5b89\u6392\u987a\u5e8f\uff0c\u8fd9\u6837\u5c31\u4e0d\u4f1a\u51fa\u9519\u4e86\u3002<\/span><\/section>\n
<\/section>\n
\n
\n
\n
\u258d15\u3001<\/span>\u7528\u4e00\u4e2aprint()\u8bed\u53e5\u6253\u5370\u591a\u4e2a\u5143\u7d20<\/span><\/span><\/p>\n
\n
\n
\n
\n
print(1,\u00a02,\u00a03,\u00a0\"a\",\u00a0\"z\",\u00a0\"this\u00a0is\u00a0here\",\u00a0\"here\u00a0is\u00a0something\u00a0else\")<\/pre>\n<\/section>\n
\n
\n
\n
\n
\u258d16\u3001<\/span>\u5728\u540c\u4e00\u884c\u6253\u5370\u591a\u4e2a\u5143\u7d20<\/span><\/span><\/p>\n
\n
\n
\n
\n
print(“Hello”<\/span>,\u00a0end=“”<\/span>)
print(“World”<\/span>)\u00a0\u00a0#\u00a0HelloWorld<\/span>

print(“Hello”<\/span>,\u00a0end=”\u00a0“<\/span>)
print(“World”<\/span>)\u00a0\u00a0#\u00a0Hello\u00a0World<\/span>

print(‘words’<\/span>,\u00a0\u00a0\u00a0‘with’<\/span>,\u00a0‘commas’<\/span>,\u00a0‘in’<\/span>,\u00a0‘between’<\/span>,\u00a0sep=‘,\u00a0‘<\/span>)
#\u00a0words,\u00a0with,\u00a0commas,\u00a0in,\u00a0between<\/span><\/p>\n<\/section>\n
<\/section>\n
\n
\n
\n
\u258d17\u3001<\/span>\u6253\u5370\u591a\u4e2a\u503c\uff0c\u5728\u6bcf\u4e2a\u503c\u4e4b\u95f4\u4f7f\u7528\u81ea\u5b9a\u4e49\u5206\u9694\u7b26<\/span><\/span><\/p>\n
\n
\n
\n
\n
print(“29”<\/span>,\u00a0“01”<\/span>,\u00a0“2022”<\/span>,\u00a0sep=“\/”<\/span>)\u00a0\u00a0#\u00a029\/01\/2022<\/span>

print(“name”<\/span>,\u00a0“domain.com”<\/span>,\u00a0sep=“@”<\/span>)\u00a0\u00a0#\u00a0name@domain.com<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d18\u3001<\/span>\u4e0d\u80fd\u5728\u53d8\u91cf\u540d\u7684\u5f00\u5934\u4f7f\u7528\u6570\u5b57<\/span><\/span><\/p>\n
\n
\n
\n
\n
four_letters\u00a0=\u00a0“abcd”<\/span>\u00a0#\u00a0this\u00a0works<\/span>

4<\/span>_letters\u00a0=\u00a0“abcd”<\/span>\u00a0#\u00a0this\u00a0doesn\u2019t\u00a0work<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u8fd9\u662fPython\u7684\u53d8\u91cf\u547d\u540d\u89c4\u5219\u3002<\/span><\/p>\n
\n
\n
\u258d19\u3001\u4e0d\u80fd\u5728\u53d8\u91cf\u540d\u7684\u5f00\u5934\u4f7f\u7528\u8fd0\u7b97\u7b26<\/span><\/span><\/p>\n
\n
\n
\n
\n
+variable\u00a0=\u00a0\"abcd\"\u00a0\u00a0#\u00a0this\u00a0doesn\u2019t\u00a0work<\/pre>\n<\/section>\n
\n
\n
\n
\n
\u258d20\u3001<\/span>\u6570\u5b57\u7684\u7b2c\u4e00\u4f4d\u4e0d\u80fd\u662f0<\/span><\/span><\/p>\n
\n
\n
\n
\n
number\u00a0=\u00a00110<\/span>\u00a0#\u00a0this\u00a0doesn’t\u00a0work<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u8fd9\u4e2a\u786e\u5b9e\u633a\u795e\u5947\u7684\u3002<\/span><\/p>\n
\n
\n
\u258d21\u3001<\/span>\u5728\u53d8\u91cf\u540d\u7684\u4efb\u4f55\u5730\u65b9\u4f7f\u7528\u4e0b\u5212\u7ebf<\/span><\/span><\/p>\n
\n
\n
\n
\n
a______b\u00a0=\u00a0“abcd”<\/span>\u00a0\u00a0#\u00a0this\u00a0works<\/span>
_a_b_c_d\u00a0=\u00a0“abcd”<\/span>\u00a0\u00a0#\u00a0this\u00a0also\u00a0works<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u8fd9\u5e76\u4e0d\u610f\u5473\u7740\uff0c\u4f60\u53ef\u4ee5\u65e0\u9650\u4f7f\u7528\uff0c\u4e3a\u4e86\u4ee3\u7801\u7684\u6613\u8bfb\u6027\uff0c\u8fd8\u662f\u9700\u8981\u5408\u7406\u4f7f\u7528\u3002<\/span><\/p>\n
\n
\n
\u258d22\u3001\u4f7f\u7528\u4e0b\u5212\u7ebf\u5206\u5272\u6570\u503c\u8f83\u5927\u7684\u6570\u5b57<\/span><\/span><\/p>\n
\n
\n
\n
\n
print(1<\/span>_000_000_000)\u00a0\u00a0#\u00a01000000000<\/span>
print(1<\/span>_234_567)\u00a0\u00a0#\u00a01234567<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u5982\u6b64\uff0c\u770b\u5230\u4e00\u5927\u5806\u6570\u5b57\u65f6\uff0c\u4e5f\u80fd\u8f7b\u677e\u9605\u8bfb\u3002<\/span><\/p>\n
\n
\n
\u258d23\u3001\u53cd\u8f6c\u5217\u8868<\/span><\/span><\/p>\n
\n
\n
\n
\n
my_list\u00a0=\u00a0[‘a’<\/span>,\u00a0‘b’<\/span>,\u00a0‘c’<\/span>,\u00a0‘d’<\/span>]

my_list.reverse()

print(my_list)\u00a0\u00a0#\u00a0[‘d’,\u00a0‘c’,\u00a0‘b’,\u00a0‘a’]<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d24\u3001\u4f7f\u7528\u6b65\u8fdb\u51fd\u6570\u5bf9\u5b57\u7b26\u4e32\u5207\u7247<\/span><\/span><\/p>\n
\n
\n
\n
\n
my_string\u00a0=\u00a0“This\u00a0is\u00a0just\u00a0a\u00a0sentence”<\/span>
print(my_string[0<\/span>:5<\/span>])\u00a0\u00a0#\u00a0This<\/span>

#\u00a0Take\u00a0three\u00a0steps\u00a0forward<\/span>
print(my_string[0<\/span>:10<\/span>:3<\/span>])\u00a0\u00a0#\u00a0Tsse<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d25\u3001\u53cd\u5411<\/span>\u5207\u7247<\/span><\/span><\/p>\n
\n
\n
\n
\n
my_string\u00a0=\u00a0“This\u00a0is\u00a0just\u00a0a\u00a0sentence”<\/span>
print(my_string[10<\/span>:0<\/span>:-1<\/span>])\u00a0\u00a0#\u00a0suj\u00a0si\u00a0sih<\/span>

#\u00a0Take\u00a0two\u00a0steps\u00a0forward<\/span>
print(my_string[10<\/span>:0<\/span>:-2<\/span>])\u00a0\u00a0#\u00a0sjs\u00a0i<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d26\u3001\u4f7f\u7528\u5f00\u59cb\u6216\u7ed3\u675f\u7d22\u5f15\u8fdb\u884c\u5207\u7247<\/span><\/span><\/p>\n
\n
\n
\n
\n
my_string\u00a0=\u00a0“This\u00a0is\u00a0just\u00a0a\u00a0sentence”<\/span>
print(my_string[4<\/span>:])\u00a0\u00a0#\u00a0is\u00a0just\u00a0a\u00a0sentence<\/span>

print(my_string[:3<\/span>])\u00a0\u00a0#\u00a0Thi<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d27\u3001<\/span>\/\u548c\/\/\u7684\u533a\u522b<\/span><\/span><\/p>\n
\n
\n
\n
\n
print(3<\/span>\/2<\/span>)\u00a0\u00a0#\u00a01.5<\/span>
print(3<\/span>\/\/2<\/span>)\u00a0\u00a0#\u00a01<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d28\u3001==\u548cis\u7684\u533a\u522b<\/span><\/span><\/p>\n
\n
is\uff1a\u68c0\u67e5\u4e24\u4e2a\u53d8\u91cf\u662f\u5426\u6307\u5411\u540c\u4e00\u5bf9\u8c61\u5185\u5b58\u4e2d<\/span><\/p>\n
==\uff1a\u6bd4\u8f83\u4e24\u4e2a\u5bf9\u8c61\u7684\u503c<\/span><\/p>\n
\n
\n
\n
\n
first_list\u00a0=\u00a0[1<\/span>,\u00a02<\/span>,\u00a03<\/span>]
second_list\u00a0=\u00a0[1<\/span>,\u00a02<\/span>,\u00a03<\/span>]

#\u00a0\u6bd4\u8f83\u4e24\u4e2a\u503c<\/span>
print(first_list\u00a0==\u00a0second_list)\u00a0\u00a0#\u00a0True<\/span>

#\u00a0\u662f\u5426\u6307\u5411\u540c\u4e00\u5185\u5b58<\/span>
print(first_list\u00a0is<\/span>\u00a0second_list)\u00a0\u00a0
#\u00a0False<\/span>


third_list\u00a0=\u00a0first_list

print(third_list\u00a0is<\/span>\u00a0first_list)\u00a0\u00a0
#\u00a0True<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d29\u3001\u5408\u5e76\u5b57\u5178<\/span><\/span><\/p>\n
\n
\n
\n
\n
dictionary_one\u00a0=\u00a0{“a”<\/span>:\u00a01<\/span>,\u00a0“b”<\/span>:\u00a02<\/span>}
dictionary_two\u00a0=\u00a0{“c”<\/span>:\u00a03<\/span>,\u00a0“d”<\/span>:\u00a04<\/span>}

merged\u00a0=\u00a0{**dictionary_one,\u00a0**dictionary_two}

print(merged)\u00a0\u00a0#\u00a0{‘a’:\u00a01,\u00a0‘b’:\u00a02,\u00a0‘c’:\u00a03,\u00a0‘d’:\u00a04}<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d30\u3001\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u5927\u4e8e\u53e6\u4e00\u5b57\u7b26\u4e32<\/span><\/span><\/p>\n
\n
\n
\n
\n
first\u00a0=\u00a0“abc”<\/span>
second\u00a0=\u00a0“def”<\/span>

print(first\u00a0<\u00a0second)\u00a0\u00a0#\u00a0True<\/span>

second\u00a0=\u00a0“ab”<\/span>
print(first\u00a0<\u00a0second)\u00a0\u00a0#\u00a0False<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d31\u3001\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u4ee5\u7279\u5b9a\u5b57\u7b26\u5f00\u5934(\u4e0d\u4f7f\u7528\u7d22\u5f15)<\/span><\/span><\/p>\n
\n
\n
\n
\n
my_string\u00a0=\u00a0“abcdef”<\/span>
print(my_string.startswith(“b”<\/span>))\u00a0\u00a0#\u00a0False<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d32\u3001\u4f7f\u7528id()\u67e5\u627e\u53d8\u91cf\u7684\u552f\u4e00id<\/span><\/span><\/p>\n
\n
\n
\n
\n
print(id(1<\/span>))\u00a0\u00a0#\u00a04325776624<\/span>
print(id(2<\/span>))\u00a0\u00a0#\u00a04325776656<\/span>
print(id(“string”<\/span>))\u00a0\u00a0#\u00a04327978288<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d33\u3001\u6574\u6570\u3001\u6d6e\u70b9\u6570\u3001\u5b57\u7b26\u4e32\u3001\u5e03\u5c14\u503c\u548c\u5143\u7ec4\u90fd\u662f\u4e0d\u53ef\u53d8\u7684<\/span><\/span><\/p>\n
\n
\u5f53\u53d8\u91cf\u88ab\u8d4b\u503c\u4e3a\u6574\u6570\u3001\u6d6e\u70b9\u6570\u3001\u5b57\u7b26\u4e32\u3001\u5e03\u5c14\u503c\u3001\u5143\u7ec4\u8fd9\u4e9b\u4e0d\u53ef\u53d8\u7c7b\u578b\u540e\uff0c\u8be5\u53d8\u91cf\u5c31\u4f1a\u6307\u5411\u4e00\u4e2a\u5185\u5b58\u5bf9\u8c61\u3002<\/span><\/p>\n
\n
\u5982\u679c\u91cd\u65b0\u7ed9\u53d8\u91cf\u518d\u8d4b\u503c\uff0c\u5b83\u7684\u5185\u5b58\u5bf9\u8c61\u5c31\u4f1a\u53d1\u751f\u6539\u53d8\u3002<\/span><\/p>\n
\n
\n
\n
\n
number\u00a0=\u00a01<\/span>
print(id(number))\u00a0\u00a0#\u00a04325215472<\/span>
print(id(1<\/span>))\u00a0\u00a0#\u00a04325215472<\/span>

number\u00a0=\u00a03<\/span>
print(id(number))\u00a0\u00a0#\u00a04325215536<\/span>
print(id(1<\/span>))\u00a0\u00a0#\u00a04325215472<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d34\u3001\u5b57\u7b26\u4e32\u548c\u5143\u7ec4\u4e5f\u662f\u4e0d\u53ef\u53d8\u7684<\/span><\/span><\/p>\n
\n
\u6b64\u5904\u518d\u8bf4\u660e\u4e00\u6b21\u3002<\/span><\/p>\n
\n
\n
\n
\n
name\u00a0=\u00a0“Fatos”<\/span>
print(id(name))\u00a0\u00a0#\u00a04422282544<\/span>

name\u00a0=\u00a0“fatos”<\/span>
print(id(name))\u00a0\u00a0#\u00a04422346608<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d35\u3001\u5217\u8868\u3001\u96c6\u5408\u548c\u5b57\u5178\u90fd\u662f\u53ef\u53d8\u7684<\/span><\/span><\/p>\n
\n
\u8fd9\u610f\u5473\u7740\u53d1\u751f\u66f4\u6539\u65f6\uff0c\u4e0d\u4f1a\u6539\u53d8\u5176\u5185\u5b58\u5bf9\u8c61\u3002<\/span><\/p>\n
\n
\n
\n
\n
cities\u00a0=\u00a0[“Beijing”<\/span>,\u00a0“Guangzhou”<\/span>,\u00a0“chengdu”<\/span>]
print(id(cities))\u00a0\u00a0#\u00a04482699712<\/span>

cities.append(“Beijing”<\/span>)
print(id(cities))\u00a0\u00a0#\u00a04482699712<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u4e0b\u9762\u662f\u5b57\u5178\u3002
<\/span><\/p>\n
\n
\n
\n
\n
my_set\u00a0=\u00a0{1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>}
print(id(my_set))\u00a0\u00a0#\u00a04352726176<\/span>

my_set.add(5<\/span>)
print(id(my_set))\u00a0\u00a0#\u00a04352726176<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d36\u3001\u628a\u4e00\u4e2a\u5217\u8868\u53d8\u6210\u4e0d\u53ef\u53d8\u7684\u5217\u8868<\/span><\/span><\/p>\n
\n
\n
\n
\n
my_set\u00a0=\u00a0frozenset([‘a’<\/span>,\u00a0‘b’<\/span>,\u00a0‘c’<\/span>,\u00a0‘d’<\/span>])

my_set.add(“a”<\/span>)<\/p>\n<\/section>\n
\n
\n
\n
\u4f7f\u7528frozenset()\u540e\uff0c\u4f60\u5c31\u65e0\u6cd5\u66f4\u6539\u4e86\u3002<\/span><\/p>\n
\n
\n
\u258d37\u3001if-elif\u5757\u53ef\u4ee5\u5728\u6ca1\u6709else\u5757\u7684\u60c5\u51b5\u4e0b\u5b58\u5728<\/span><\/span><\/p>\n
\n
\u4f46\u662felif\u4e0d\u80fd\u5728\u6ca1\u6709if\u8bed\u53e5\u4e4b\u524d\u72ec\u7acb\u5b58\u5728\u3002<\/span><\/p>\n
\n
\n
\n
\n
def<\/span>\u00a0check_number<\/span>(number)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0number\u00a0>\u00a00<\/span>:
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0“Positive”<\/span>
\u00a0\u00a0\u00a0\u00a0elif<\/span>\u00a0number\u00a0==\u00a00<\/span>:
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0“Zero”<\/span>

\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0“Negative”<\/span>


print(check_number(1<\/span>))\u00a0\u00a0#\u00a0Positive<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d38\u3001\u4f7f\u7528sorted()\u68c0\u67e52\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u76f8\u540c<\/span><\/span><\/p>\n
\n
\n
\n
\n
def<\/span>\u00a0check_if_anagram<\/span>(first_word,\u00a0second_word)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0first_word\u00a0=\u00a0first_word.lower()
\u00a0\u00a0\u00a0\u00a0second_word\u00a0=\u00a0second_word.lower()
\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0sorted(first_word)\u00a0==\u00a0sorted(second_word)


print(check_if_anagram(“testinG”<\/span>,\u00a0“Testing”<\/span>))\u00a0\u00a0#\u00a0True<\/span>
print(check_if_anagram(“Here”<\/span>,\u00a0“Rehe”<\/span>))\u00a0\u00a0#\u00a0True<\/span>
print(check_if_anagram(“Know”<\/span>,\u00a0“Now”<\/span>))\u00a0\u00a0#\u00a0False<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d39\u3001\u83b7\u53d6\u5b57\u7b26\u7684Unicode\u503c<\/span><\/span><\/p>\n
\n
\n
\n
\n
print(ord(“A”<\/span>))\u00a0\u00a0#\u00a065<\/span>
print(ord(“B”<\/span>))\u00a0\u00a0#\u00a066<\/span>
print(ord(“C”<\/span>))\u00a0\u00a0#\u00a066<\/span>
print(ord(“a”<\/span>))\u00a0\u00a0#\u00a097<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d40\u3001\u83b7\u53d6\u5b57\u5178\u7684\u952e<\/span><\/span><\/p>\n
\n
\n
\n
\n
dictionary\u00a0=\u00a0{“a”<\/span>:\u00a01<\/span>,\u00a0“b”<\/span>:\u00a02<\/span>,\u00a0“c”<\/span>:\u00a03<\/span>}

keys\u00a0=\u00a0dictionary.keys()
print(list(keys))\u00a0\u00a0#\u00a0[‘a’,\u00a0‘b’,\u00a0‘c’]<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d41\u3001\u83b7\u53d6\u5b57\u5178\u7684\u503c<\/span><\/span><\/p>\n
\n
\n
\n
\n
dictionary\u00a0=\u00a0{“a”<\/span>:\u00a01<\/span>,\u00a0“b”<\/span>:\u00a02<\/span>,\u00a0“c”<\/span>:\u00a03<\/span>}

values\u00a0=\u00a0dictionary.values()
print(list(values))\u00a0\u00a0#\u00a0[1,\u00a02,\u00a03]<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d42\u3001\u4ea4\u6362\u5b57\u5178\u7684\u952e\u3001\u503c\u4f4d\u7f6e<\/span><\/span><\/p>\n
\n
\n
\n
\n
dictionary\u00a0=\u00a0{“a”<\/span>:\u00a01<\/span>,\u00a0“b”<\/span>:\u00a02<\/span>,\u00a0“c”<\/span>:\u00a03<\/span>}

reversed_dictionary\u00a0=\u00a0{j:\u00a0i\u00a0for<\/span>\u00a0i,\u00a0j\u00a0in<\/span>\u00a0dictionary.items()}
print(reversed)\u00a0\u00a0#\u00a0{1:\u00a0‘a’,\u00a02:\u00a0‘b’,\u00a03:\u00a0‘c’}<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d43\u3001\u5c06\u5e03\u5c14\u503c\u8f6c\u6362\u4e3a\u6570\u5b57<\/span><\/span><\/p>\n
\n
\n
\n
\n
print(int(False<\/span>))\u00a0\u00a0#\u00a00<\/span>
print(float(True<\/span>))\u00a0\u00a0#\u00a01.0<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d44\u3001\u5728\u7b97\u672f\u8fd0\u7b97\u4e2d\u4f7f\u7528\u5e03\u5c14\u503c<\/span><\/span><\/p>\n
\n
\n
\n
\n
x\u00a0=\u00a010<\/span>
y\u00a0=\u00a012<\/span>

result\u00a0=\u00a0(x\u00a0–\u00a0False<\/span>)\/(y\u00a0*\u00a0True<\/span>)
print(result)\u00a0\u00a0#\u00a00.8333333333333334<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d45\u3001\u5c06\u4efb\u4f55\u6570\u636e\u7c7b\u578b\u8f6c\u6362\u4e3a\u5e03\u5c14\u503c<\/span><\/span><\/p>\n
\n
\n
\n
\n
print(bool(.0<\/span>))\u00a0\u00a0#\u00a0False<\/span>
print(bool(3<\/span>))\u00a0\u00a0#\u00a0True<\/span>
print(bool(“-“<\/span>))\u00a0\u00a0#\u00a0True<\/span>
print(bool(“string”<\/span>))\u00a0\u00a0#\u00a0True<\/span>
print(bool(”\u00a0“<\/span>))\u00a0\u00a0#\u00a0True<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d46\u3001\u5c06\u503c\u8f6c\u6362\u4e3a\u590d\u6570<\/span><\/span><\/p>\n
\n
\n
\n
\n
print(complex(10<\/span>,\u00a02<\/span>))\u00a0\u00a0#\u00a0(10+2j)<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u4e5f\u53ef\u4ee5\u5c06\u6570\u5b57\u8f6c\u6362\u4e3a\u5341\u516d\u8fdb\u5236\u6570\u3002<\/span><\/p>\n
\n
\n
\n
\n
print(hex(11<\/span>))\u00a0\u00a0#\u00a00xb<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d47\u3001\u5728\u5217\u8868\u7684\u7b2c\u4e00\u4e2a\u4f4d\u7f6e\u6dfb\u52a0\u4e00\u4e2a\u503c<\/span><\/span><\/p>\n
\n
\u5982\u679c\u4f7f\u7528append()\uff0c\u5c06\u4ece\u5217\u8868\u7684\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e\u63d2\u5165\u65b0\u503c\u3002<\/span><\/p>\n
\n
\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528insert()\uff0c\u6765\u6307\u5b9a\u63d2\u5165\u65b0\u5143\u7d20\u7684\u7d22\u5f15\u548c\u6570\u503c\u3002<\/span><\/p>\n
\n
\u90a3\u4e48\u5217\u8868\u7684\u7b2c\u4e00\u4e2a\u4f4d\u7f6e\u4e3a0\uff0c\u5373\u4e0b\u6807\u4e3a0\u3002<\/span><\/p>\n
\n
\n
\n
\n
my_list\u00a0=\u00a0[3<\/span>,\u00a04<\/span>,\u00a05<\/span>]

my_list.append(6<\/span>)
my_list.insert(0<\/span>,\u00a02<\/span>)
print(my_list)\u00a0\u00a0#\u00a0[2,\u00a03,\u00a04,\u00a05,\u00a06]<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d48\u3001Lambda\u51fd\u6570\u53ea\u80fd\u5728\u4e00\u884c\u4ee3\u7801\u4e2d<\/span><\/span><\/p>\n
\n
\u65e0\u6cd5\u901a\u8fc7\u591a\u884c\u4ee3\u7801\uff0c\u6765\u4f7f\u7528lambda\u51fd\u6570\u3002<\/span><\/p>\n
\n
\n
\n
\n
comparison\u00a0=\u00a0lambda<\/span>\u00a0x:\u00a0if<\/span>\u00a0x\u00a0>\u00a03<\/span>:
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0print(“x\u00a0>\u00a03”<\/span>)
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0else<\/span>:
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0print(“x\u00a0is\u00a0not\u00a0greater\u00a0than\u00a03”<\/span>)<\/p>\n<\/section>\n
\n
\n
\n
\u62a5\u9519\u3002<\/span><\/p>\n
\n
\n
\n
\"image.png\"<\/div><\/section>\n
\n
\n
\n
\n
\u258d49\u3001Lambda\u4e2d\u7684\u6761\u4ef6\u8bed\u53e5\u5e94\u59cb\u7ec8\u5305\u542belse\u8bed\u53e5<\/span><\/span><\/p>\n
\n
\n
\n
\n
comparison\u00a0=\u00a0lambda<\/span>\u00a0x:\u00a0“x\u00a0>\u00a03”<\/span>\u00a0if<\/span>\u00a0x\u00a0>\u00a03<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u8fd0\u884c\u4e0a\u9762\u7684\u4ee3\u7801\uff0c\u62a5\u9519\u3002<\/span><\/p>\n
\n
\n
\n
\"image.png\"<\/div><\/section>\n
\n
\n
\n
\u8fd9\u662f\u7531\u4e8e\u6761\u4ef6\u8868\u8fbe\u5f0f\u7684\u7279\u6027\uff0c\u800c\u4e0d\u662flambda\u7684\u5bfc\u81f4\u7684\u3002<\/span><\/p>\n
\n
\n
\u258d50\u3001\u4f7f\u7528filter()\uff0c\u83b7\u5f97\u4e00\u4e2a\u65b0\u5bf9\u8c61<\/span><\/span><\/p>\n
\n
\n
\n
\n
my_list\u00a0=\u00a0[1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>]

odd\u00a0=\u00a0filter(lambda<\/span>\u00a0x:\u00a0x\u00a0%\u00a02<\/span>\u00a0==\u00a01<\/span>,\u00a0my_list)

print(list(odd))\u00a0\u00a0\u00a0#\u00a0[1,\u00a03]<\/span>
print(my_list)\u00a0\u00a0#\u00a0[1,\u00a02,\u00a03,\u00a04]<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d51\u3001map<\/span><\/span>()\u8fd4\u56de\u4e00\u4e2a\u65b0\u5bf9\u8c61<\/span><\/p>\n
\n
map()\u51fd\u6570\u5c06\u7ed9\u5b9a\u51fd\u6570\u5e94\u7528\u4e8e\u53ef\u8fed\u4ee3\u5bf9\u8c61(\u5217\u8868\u3001\u5143\u7ec4\u7b49)\uff0c\u7136\u540e\u8fd4\u56de\u7ed3\u679c(map\u5bf9\u8c61)\u3002<\/span><\/p>\n
\n
\n
\n
\n
my_list\u00a0=\u00a0[1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>]

squared\u00a0=\u00a0map(lambda<\/span>\u00a0x:\u00a0x\u00a0**\u00a02<\/span>,\u00a0my_list)

print(list(squared))\u00a0\u00a0\u00a0#\u00a0[1,\u00a04,\u00a09,\u00a016]<\/span>
print(my_list)\u00a0\u00a0#\u00a0[1,\u00a02,\u00a03,\u00a04]<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d52\u3001range()\u7684step\u53c2\u6570<\/span><\/span><\/p>\n
\n
\n
\n
\n
for<\/span>\u00a0number\u00a0in<\/span>\u00a0range(1<\/span>,\u00a010<\/span>,\u00a03<\/span>):
\u00a0\u00a0\u00a0\u00a0print(number,\u00a0end=”\u00a0“<\/span>)
#\u00a01\u00a04\u00a07<\/span><\/section>\n<\/section>\n
\n
\n
\n
\n
\u258d53\u3001range()\u9ed8\u8ba4\u4ece0\u5f00\u59cb<\/span><\/span><\/p>\n
\n
\n
\n
\n
def<\/span>\u00a0range_with_zero<\/span>(number)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0for<\/span>\u00a0i\u00a0in<\/span>\u00a0range(0<\/span>,\u00a0number):
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0print(i,\u00a0end=‘\u00a0‘<\/span>)


def<\/span>\u00a0range_with_no_zero<\/span>(number)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0for<\/span>\u00a0i\u00a0in<\/span>\u00a0range(number):
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0print(i,\u00a0end=‘\u00a0‘<\/span>)


range_with_zero(3<\/span>)\u00a0\u00a0#\u00a00\u00a01\u00a02<\/span>
range_with_no_zero(3<\/span>)\u00a0\u00a0#\u00a00\u00a01\u00a02<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d54\u3001\u4e0d\u9700\u8981\u548c0\u6bd4\u8f83\u957f\u5ea6<\/span><\/span><\/p>\n
\n
\u5982\u679c\u957f\u5ea6\u5927\u4e8e0\uff0c\u5219\u9ed8\u8ba4\u4e3aTrue\u3002<\/span><\/p>\n
\n
\n
\n
\n
def<\/span>\u00a0get_element_with_comparison<\/span>(my_list)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0len(my_list)\u00a0>\u00a00<\/span>:
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0my_list[0<\/span>]


def<\/span>\u00a0get_first_element<\/span>(my_list)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0len(my_list):
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0my_list[0<\/span>]


elements\u00a0=\u00a0[1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>]
first_result\u00a0=\u00a0get_element_with_comparison(elements)
second_result\u00a0=\u00a0get_element_with_comparison(elements)

print(first_result\u00a0==\u00a0second_result)\u00a0\u00a0#\u00a0True<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d55\u3001\u53ef\u4ee5\u5728\u540c\u4e00\u4e2a\u4f5c\u7528\u57df\u5185\u591a\u6b21\u5b9a\u4e49\u4e00\u4e2a\u65b9\u6cd5<\/span><\/span><\/p>\n
\n
\u4f46\u662f\uff0c\u53ea\u6709\u6700\u540e\u4e00\u4e2a\u4f1a\u88ab\u8c03\u7528\uff0c\u8986\u76d6\u4ee5\u524d\u3002<\/span><\/p>\n
\n
\n
\n
\n
def<\/span>\u00a0get_address<\/span>()<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0“First\u00a0address”<\/span>


def<\/span>\u00a0get_address<\/span>()<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0“Second\u00a0address”<\/span>


def<\/span>\u00a0get_address<\/span>()<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0“Third\u00a0address”<\/span>


print(get_address())\u00a0\u00a0#\u00a0Third\u00a0address<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d56\u3001\u5728\u5916\u90e8\u76f4\u63a5\u8bbf\u95ee\u79c1\u6709\u5c5e\u6027<\/span><\/span><\/p>\n
\n
\u5728\u5b9a\u4e49\u5c5e\u6027\u6216\u65b9\u6cd5\u65f6\uff0c\u5728\u5c5e\u6027\u540d\u6216\u8005\u65b9\u6cd5\u540d\u524d\u589e\u52a0\u4e24\u4e2a\u4e0b\u5212\u7ebf\uff0c\u5b9a\u4e49\u7684\u5c31\u662f\u79c1\u6709\u5c5e\u6027\u6216\u65b9\u6cd5\u3002<\/span><\/p>\n
\n
\u5982\u679c\u60f3\u8981\u5728\u5916\u90e8\u8bbf\u95ee\uff0c\u90a3\u4e48\u53ea\u9700\u8981\u5728\u540d\u79f0\u524d\u9762\u52a0\u4e0a ‘_\u7c7b\u540d’ \u53d8\u6210 ‘_\u7c7b\u540d__\u540d\u79f0’\u3002<\/span><\/p>\n
\n
\n
\n
\n
class<\/span>\u00a0Engineer<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0def<\/span>\u00a0__init__<\/span>(self,\u00a0name)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.name\u00a0=\u00a0name
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.__starting_salary\u00a0=\u00a062000<\/span>


dain\u00a0=\u00a0Engineer(‘Dain’<\/span>)
print(dain._Engineer__starting_salary)\u00a0\u00a0#\u00a062000<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d57\u3001\u68c0\u67e5\u5bf9\u8c61\u7684\u5185\u5b58\u4f7f\u7528\u60c5\u51b5<\/span><\/span><\/p>\n
\n
\n
\n
\n
import<\/span>\u00a0sys

print(sys.getsizeof(“bitcoin”<\/span>))\u00a0\u00a0#\u00a056<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d58\u3001\u5b9a\u4e49\u4e00\u4e2a\u65b9\u6cd5\uff0c\u53ef\u4ee5\u8c03\u7528\u4efb\u610f\u4e2a\u53c2\u6570<\/span><\/span><\/p>\n
\n
\n
\n
\n
def<\/span>\u00a0get_sum<\/span>(*arguments)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0result\u00a0=\u00a00<\/span>
\u00a0\u00a0\u00a0\u00a0for<\/span>\u00a0i\u00a0in<\/span>\u00a0arguments:
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0result\u00a0+=\u00a0i
\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0result


print(get_sum(1<\/span>,\u00a02<\/span>,\u00a03<\/span>))\u00a0\u00a0#\u00a06<\/span>
print(get_sum(1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>,\u00a05<\/span>))\u00a0\u00a0#\u00a015<\/span>
print(get_sum(1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>,\u00a05<\/span>,\u00a06<\/span>,\u00a07<\/span>))\u00a0\u00a0#\u00a028<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d59\u3001\u4f7f\u7528super()\u6216\u7236\u7c7b\u7684\u540d\u79f0\u8c03\u7528\u7236\u7c7b\u7684\u521d\u59cb\u5316<\/span><\/span><\/p>\n
\n
\u4f7f\u7528super\u51fd\u6570\u8c03\u7528\u7236\u7c7b\u7684\u521d\u59cb\u5316\u65b9\u6cd5\u3002<\/span><\/p>\n
\n
\n
\n
\n
class<\/span>\u00a0Parent<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0def<\/span>\u00a0__init__<\/span>(self,\u00a0city,\u00a0address)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.city\u00a0=\u00a0city
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.address\u00a0=\u00a0address


class<\/span>\u00a0Child<\/span>(Parent)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0def<\/span>\u00a0__init__<\/span>(self,\u00a0city,\u00a0address,\u00a0university)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0super().__init__(city,\u00a0address)
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.university\u00a0=\u00a0university


child\u00a0=\u00a0Child(‘Peking University’<\/span>,\u00a0‘Fudan University’<\/span>,\u00a0‘Tsinghua University’<\/span>)
print(child.university)\u00a0\u00a0#\u00a0Tsinghua University<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u4f7f\u7528\u7236\u7c7b\u7684\u540d\u79f0\u8c03\u7528\u7236\u7c7b\u3002<\/span><\/p>\n
\n
\n
\n
\n
class<\/span>\u00a0Parent<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0def<\/span>\u00a0__init__<\/span>(self,\u00a0city,\u00a0address)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.city\u00a0=\u00a0city
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.address\u00a0=\u00a0address


class<\/span>\u00a0Child<\/span>(Parent)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0def<\/span>\u00a0__init__<\/span>(self,\u00a0city,\u00a0address,\u00a0university)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Parent.__init__(self,\u00a0city,\u00a0address)
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.university\u00a0=\u00a0university


child\u00a0=\u00a0Child(<\/span>‘Peking University’<\/span>,\u00a0<\/span>‘Fudan University’<\/span>,\u00a0<\/span>‘Tsinghua University’<\/span>)<\/span>
print(child.university)\u00a0\u00a0#\u00a0Tsinghua University<\/span><\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d60\u3001\u5728\u7c7b\u4e2d\u4f7f\u7528 + \u64cd\u4f5c\u7b26<\/span><\/span><\/p>\n
\n
\u5728\u4e24\u4e2aint\u6570\u636e\u7c7b\u578b\u4e4b\u95f4\u4f7f\u7528 + \u8fd0\u7b97\u7b26\u65f6\uff0c\u5c06\u5f97\u5230\u5b83\u4eec\u7684\u548c\u3002<\/span><\/p>\n
\n
\u800c\u5728\u4e24\u4e2a\u5b57\u7b26\u4e32\u6570\u636e\u7c7b\u578b\u4e4b\u95f4\u4f7f\u7528\u5b83\u65f6\uff0c\u4f1a\u5c06\u5176\u5408\u5e76\u3002<\/span><\/p>\n
\n
\n
\n
\n
print(10<\/span>\u00a0+\u00a01<\/span>)\u00a0\u00a0# \u4e24\u6570\u76f8\u52a0<\/span>
print(‘first’<\/span>\u00a0+\u00a0‘second’<\/span>)\u00a0\u00a0#\u00a0\u5b57\u7b26\u4e32\u76f8\u52a0<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u8fd9\u4e2a\u5c31\u662f\u64cd\u4f5c\u7b26\u91cd\u8f7d\uff0c<\/span>\u4f60\u8fd8\u53ef\u4ee5\u5728\u7c7b\u4e2d\u4f7f\u7528(__add__)\u3002<\/span><\/span><\/p>\n
\n
\n
\n
\n
class<\/span>\u00a0Expenses<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0def<\/span>\u00a0__init__<\/span>(self,\u00a0rent,\u00a0groceries)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.rent\u00a0=\u00a0rent
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.groceries\u00a0=\u00a0groceries

\u00a0\u00a0\u00a0\u00a0def<\/span>\u00a0__add__<\/span>(self,\u00a0other)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0Expenses(self.rent\u00a0+\u00a0other.rent,
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.groceries\u00a0+\u00a0other.groceries)


april_expenses\u00a0=\u00a0Expenses(1000<\/span>,\u00a0200<\/span>)
may_expenses\u00a0=\u00a0Expenses(1000<\/span>,\u00a0300<\/span>)

total_expenses\u00a0=\u00a0april_expenses\u00a0+\u00a0may_expenses
print(total_expenses.rent)\u00a0\u00a0#\u00a02000<\/span>
print(total_expenses.groceries)\u00a0\u00a0#\u00a0500<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d61\u3001\u5728\u7c7b\u4e2d\u4f7f\u7528\u00a0< \u548c == \u64cd\u4f5c\u7b26<\/span><\/span><\/p>\n
\n
\u4e0b\u9762\u5b9a\u4e49\u4e00\u4e2a\u64cd\u4f5c\u91cd\u8f7d\u793a\u4f8b( < \u64cd\u4f5c\u7b26)\uff0c\u4f7f\u7528__lt__\u65b9\u6cd5\u3002<\/span><\/p>\n
\n
\n
\n
\n
class<\/span>\u00a0Game<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0def<\/span>\u00a0__init__<\/span>(self,\u00a0score)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.score\u00a0=\u00a0score

\u00a0\u00a0\u00a0\u00a0def<\/span>\u00a0__lt__<\/span>(self,\u00a0other)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0self.score\u00a0<\u00a0other.score


first\u00a0=\u00a0Game(1<\/span>)
second\u00a0=\u00a0Game(2<\/span>)

print(first\u00a0<\u00a0second)\u00a0\u00a0#\u00a0True<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u540c\u6837\u7684\uff0c== \u64cd\u4f5c\u7b26\u4f7f\u7528__eq__\u65b9\u6cd5\u3002
<\/span><\/p>\n
\n
\n
\n
\n
class<\/span>\u00a0Journey<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0def<\/span>\u00a0__init__<\/span>(self,\u00a0location,\u00a0destination,\u00a0duration)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.location\u00a0=\u00a0location
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.destination\u00a0=\u00a0destination
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.duration\u00a0=\u00a0duration

\u00a0\u00a0\u00a0\u00a0def<\/span>\u00a0__eq__<\/span>(self,\u00a0other)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0((self.location\u00a0==\u00a0other.location)\u00a0and<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(self.destination\u00a0==\u00a0other.destination)\u00a0and<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(self.duration\u00a0==\u00a0other.duration))


first\u00a0=\u00a0Journey(‘Location\u00a0A’<\/span>,\u00a0‘Destination\u00a0A’<\/span>,\u00a0’30min’<\/span>)
second\u00a0=\u00a0Journey(‘Location\u00a0B’<\/span>,\u00a0‘Destination\u00a0B’<\/span>,\u00a0’30min’<\/span>)

print(first\u00a0==\u00a0second)<\/p>\n<\/section>\n
<\/section>\n
\n
\n
\u8fd8\u6709\u4e00\u4e9b\u5176\u4ed6\u7684\u5b9a\u4e49\u3002
<\/span><\/p>\n
\n
\n
\n
\n
__sub__()\u00a0for<\/span>\u00a0–
__mul__()\u00a0for<\/span>\u00a0*
__truediv__()\u00a0for<\/span>\u00a0\/
__ne__()\u00a0for<\/span>\u00a0!=
__ge__()\u00a0for<\/span>\u00a0>=
__gt__()\u00a0for<\/span>\u00a0><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d62\u3001\u4e3a\u7c7b\u7684\u5bf9\u8c61\u5b9a\u4e49\u81ea\u5b9a\u4e49\u7684\u53ef\u6253\u5370\u7248\u672c<\/span><\/span><\/p>\n
\n
\n
\n
\n
class<\/span>\u00a0Rectangle<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0def<\/span>\u00a0__init__<\/span>(self,\u00a0a,\u00a0b)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.a\u00a0=\u00a0a
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.b\u00a0=\u00a0b

\u00a0\u00a0\u00a0\u00a0def<\/span>\u00a0__repr__<\/span>(self)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0repr(‘Rectangle\u00a0with\u00a0area=’<\/span>\u00a0+\u00a0str(self.a\u00a0*\u00a0self.b))


print(Rectangle(3<\/span>,\u00a04<\/span>))\u00a0\u00a0#\u00a0‘Rectangle\u00a0with\u00a0area=12’<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d63\u3001\u4ea4\u6362\u5b57\u7b26\u4e32\u4e2d\u5b57\u7b26\u7684\u5927\u5c0f\u5199<\/span><\/span><\/p>\n
\n
\n
\n
\n
string\u00a0=\u00a0“This\u00a0is\u00a0just\u00a0a\u00a0sentence.”<\/span>
result\u00a0=\u00a0string.swapcase()

print(result)\u00a0\u00a0#\u00a0tHIS\u00a0IS\u00a0JUST\u00a0A\u00a0SENTENCE.<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d64\u3001\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u90fd\u662f\u7a7a\u683c<\/span><\/span><\/p>\n
\n
\n
\n
\n
string\u00a0=\u00a0”\u00a0\u00a0“<\/span>
result\u00a0=\u00a0string.isspace()

print(result)\u00a0\u00a0#\u00a0True<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d65\u3001\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u90fd\u662f\u5b57\u6bcd\u6216\u6570\u5b57<\/span><\/span><\/p>\n
\n
\n
\n
\n
name\u00a0=\u00a0“Password”<\/span>
print(name.isalnum())\u00a0\u00a0#\u00a0True<\/span>

name\u00a0=\u00a0“Secure\u00a0Password\u00a0“<\/span>
print(name.isalnum())\u00a0\u00a0#\u00a0False<\/span>

name\u00a0=\u00a0“S3cur3P4ssw0rd”<\/span>
print(name.isalnum())\u00a0\u00a0#\u00a0True<\/span>

name\u00a0=\u00a0“133”<\/span>
print(name.isalnum())\u00a0\u00a0#\u00a0True<\/span><\/section>\n<\/section>\n
\n
\n
\n
\n
\u258d66\u3001\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u90fd\u662f\u5b57\u6bcd<\/span><\/span><\/p>\n
\n
\n
<\/section>\n
\n
string\u00a0=\u00a0“Name”<\/span>
print(string.isalpha())\u00a0\u00a0#\u00a0True<\/span>

string\u00a0=\u00a0“Firstname\u00a0Lastname”<\/span>
print(string.isalpha())\u00a0\u00a0#\u00a0False<\/span>

string\u00a0=\u00a0“P4ssw0rd”<\/span>
print(string.isalpha())\u00a0\u00a0#\u00a0False<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d67\u3001\u6839\u636e\u53c2\u6570\u5220\u9664\u5b57\u7b26<\/span><\/span><\/p>\n
\n
\u4ece\u53f3\u4fa7\u5f00\u59cb\u3002<\/span><\/p>\n
\n
\n
\n
\n
string\u00a0=\u00a0“This\u00a0is\u00a0a\u00a0sentence\u00a0with\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0“<\/span>
print(string.rstrip())\u00a0\u00a0#\u00a0“This\u00a0is\u00a0a\u00a0sentence\u00a0with”<\/span>

string\u00a0=\u00a0“this\u00a0here\u00a0is\u00a0a\u00a0sentence\u2026..,,,,aaaaasd”<\/span>
print(string.rstrip(“.,dsa”<\/span>))\u00a0\u00a0#\u00a0“this\u00a0here\u00a0is\u00a0a\u00a0sentence”<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u540c\u6837\u7684\uff0c\u5de6\u4fa7\u4e5f\u80fd\u64cd\u4f5c\u3002
<\/span><\/p>\n
\n
\n
\n
\n
string\u00a0=\u00a0“ffffffffFirst”<\/span>
print(string.lstrip(“f”<\/span>))\u00a0\u00a0#\u00a0First<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d68\u3001\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u6570\u5b57<\/span><\/span><\/p>\n
\n
\n
\n
\n
string\u00a0=\u00a0“seven”<\/span>
print(string.isdigit())\u00a0\u00a0#\u00a0False<\/span>

string\u00a0=\u00a0“1337”<\/span>
print(string.isdigit())\u00a0\u00a0#\u00a0True<\/span>

string\u00a0=\u00a0“5a”<\/span>
print(string.isdigit())\u00a0\u00a0#\u00a0False<\/span>

string\u00a0=\u00a0“2**5”<\/span>
print(string.isdigit())\u00a0\u00a0#\u00a0False<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d69\u3001\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u4e2d\u6587\u6570\u5b57<\/span><\/span><\/p>\n
\n
\n
\n
\n
#\u00a042673<\/span>
string\u00a0=\u00a0“\u56db\u4e8c\u516d\u4e03\u4e09”<\/span>

print(string.isdigit())\u00a0\u00a0#\u00a0False<\/span>
print(string.isnumeric())\u00a0\u00a0#\u00a0True<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d70\u3001\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u6240\u6709\u5355\u8bcd\u90fd\u662f\u5927\u5199\u5f00\u5934<\/span><\/span><\/p>\n
\n
\n
\n
\n
string\u00a0=\u00a0“This\u00a0is\u00a0a\u00a0sentence”<\/span>
print(string.istitle())\u00a0\u00a0#\u00a0False<\/span>

string\u00a0=\u00a0“10\u00a0Python\u00a0Tips”<\/span>
print(string.istitle())\u00a0\u00a0#\u00a0True<\/span>

string\u00a0=\u00a0“How\u00a0to\u00a0Print\u00a0A\u00a0String\u00a0in\u00a0Python”<\/span>
#\u00a0False<\/span>
print(string.istitle())

string\u00a0=\u00a0“PYTHON”<\/span>
print(string.istitle())\u00a0\u00a0#\u00a0False<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d71\u3001\u5728\u5143\u7ec4\u4e2d\u4f7f\u7528\u8d1f\u7d22\u5f15<\/span><\/span><\/p>\n
\n
\n
\n
\n
numbers\u00a0=\u00a0(1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>)

print(numbers[-1<\/span>])\u00a0\u00a0#\u00a04<\/span>
print(numbers[-4<\/span>])\u00a0\u00a0#\u00a01<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d72\u3001\u5728\u5143\u7ec4\u4e2d\u5d4c\u5957\u5217\u8868\u548c\u5143\u7ec4<\/span><\/span><\/p>\n
\n
\n
\n
\n
mixed_tuple\u00a0=\u00a0((“a”<\/span>*10<\/span>,\u00a03<\/span>,\u00a04<\/span>),\u00a0[‘first’<\/span>,\u00a0‘second’<\/span>,\u00a0‘third’<\/span>])

print(mixed_tuple[1<\/span>])\u00a0\u00a0#\u00a0[‘first’,\u00a0‘second’,\u00a0‘third’]<\/span>
print(mixed_tuple[0<\/span>])\u00a0\u00a0#\u00a0(‘aaaaaaaaaa’,\u00a03,\u00a04)<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d73\u3001\u5feb\u901f\u7edf\u8ba1\u5143\u7d20\u5728\u5217\u8868\u4e2d\u51fa\u73b0\u7684\u6b21\u6570<\/span><\/span><\/p>\n
\n
\n
\n
\n
names\u00a0=\u00a0[“Besim”<\/span>,\u00a0“Albert”<\/span>,\u00a0“Besim”<\/span>,\u00a0“Fisnik”<\/span>,\u00a0“Meriton”<\/span>]

print(names.count(“Besim”<\/span>))\u00a0\u00a0#\u00a02<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d74\u3001\u4f7f\u7528slice()\u83b7\u53d6\u5143\u7d20<\/span><\/span><\/p>\n
\n
\u4f7f\u7528slice()\u83b7\u53d6\u6700\u540en\u4e2a\u5143\u7d20\u3002<\/span><\/p>\n
\n
\n
\n
\n
my_list\u00a0=\u00a0[1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>,\u00a05<\/span>,\u00a06<\/span>,\u00a07<\/span>,\u00a08<\/span>,\u00a09<\/span>,\u00a010<\/span>]
slicing\u00a0=\u00a0slice(-4<\/span>,\u00a0None<\/span>)
print(my_list[slicing])\u00a0\u00a0#\u00a0[4,\u00a05,\u00a06]<\/span>

print(my_list[-3<\/span>])\u00a0\u00a0#\u00a04<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u4f7f\u7528slice()\u505a\u5207\u7247\u4efb\u52a1\u3002<\/span><\/p>\n
\n
\n
\n
\n
string\u00a0=\u00a0“Data\u00a0Science”<\/span>

slice_object\u00a0=\u00a0slice(5<\/span>,\u00a0None<\/span>)
print(string[slice_object])\u00a0\u00a0\u00a0#\u00a0Science<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d75\u3001\u8ba1\u7b97\u5143\u7d20\u5728\u5143\u7ec4\u4e2d\u51fa\u73b0\u7684\u6b21\u6570<\/span><\/span><\/p>\n
\n
\n
\n
\n
my_tuple\u00a0=\u00a0(‘a’<\/span>,\u00a01<\/span>,\u00a0‘f’<\/span>,\u00a0‘a’<\/span>,\u00a05<\/span>,\u00a0‘a’<\/span>)

print(my_tuple.count(‘a’<\/span>))\u00a0\u00a0#\u00a03<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d76\u3001\u83b7\u53d6\u5143\u7ec4\u4e2d\u5143\u7d20\u7684\u7d22\u5f15<\/span><\/span><\/p>\n
\n
\n
\n
\n
my_tuple\u00a0=\u00a0(‘a’<\/span>,\u00a01<\/span>,\u00a0‘f’<\/span>,\u00a0‘a’<\/span>,\u00a05<\/span>,\u00a0‘a’<\/span>)

print(my_tuple.index(‘f’<\/span>))\u00a0\u00a0#\u00a0\u00a02<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d77\u3001\u6b65\u8fdb\u83b7\u5f97\u5143\u7ec4<\/span><\/span><\/p>\n
\n
\n
\n
\n
my_tuple\u00a0=\u00a0(1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>,\u00a05<\/span>,\u00a06<\/span>,\u00a07<\/span>,\u00a08<\/span>,\u00a09<\/span>,\u00a010<\/span>)

print(my_tuple[::3<\/span>])\u00a0\u00a0#\u00a0(1,\u00a04,\u00a07,\u00a010)<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d78\u3001\u901a\u8fc7\u7d22\u5f15\u83b7\u53d6\u5b50\u5143\u7ec4<\/span><\/span><\/p>\n
\n
\n
\n
\n
my_tuple\u00a0=\u00a0(1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>,\u00a05<\/span>,\u00a06<\/span>,\u00a07<\/span>,\u00a08<\/span>,\u00a09<\/span>,\u00a010<\/span>)

print(my_tuple[3<\/span>:])\u00a0\u00a0#\u00a0(4,\u00a05,\u00a06,\u00a07,\u00a08,\u00a09,\u00a010)<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d79\u3001\u5c06\u5217\u8868\u3001\u96c6\u5408\u3001\u5b57\u5178\u4e2d\u6240\u6709\u5143\u7d20\u5220\u9664<\/span><\/span><\/p>\n
\n
\n
\n
\n
my_list\u00a0=\u00a0[1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>]
my_list.clear()
print(my_list)\u00a0\u00a0#\u00a0[]<\/span>

my_set\u00a0=\u00a0{1<\/span>,\u00a02<\/span>,\u00a03<\/span>}
my_set.clear()
print(my_set)\u00a0\u00a0#\u00a0set()<\/span>

my_dict\u00a0=\u00a0{“a”<\/span>:\u00a01<\/span>,\u00a0“b”<\/span>:\u00a02<\/span>}
my_dict.clear()
print(my_dict)\u00a0\u00a0#\u00a0{}<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d80\u3001\u5408\u5e76\u96c6\u5408<\/span><\/span><\/p>\n
\n
\u4f7f\u7528union()\u65b9\u6cd5\uff0c\u8fd4\u56de\u4e00\u4e2a\u65b0\u96c6\u5408\u3002<\/span><\/p>\n
\n
\n
\n
\n
first_set\u00a0=\u00a0{4<\/span>,\u00a05<\/span>,\u00a06<\/span>}
second_set\u00a0=\u00a0{1<\/span>,\u00a02<\/span>,\u00a03<\/span>}

print(first_set.union(second_set))\u00a0\u00a0#\u00a0{1,\u00a02,\u00a03,\u00a04,\u00a05,\u00a06}<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u8fd8\u53ef\u4ee5\u4f7f\u7528update()\u65b9\u6cd5\uff0c\u5c06\u7b2c\u4e8c\u4e2a\u96c6\u5408\u7684\u5143\u7d20\u63d2\u5165\u5230\u7b2c\u4e00\u4e2a\u96c6\u5408\u4e2d\u53bb\u3002<\/span><\/p>\n
\n
\n
\n
\n
first_set\u00a0=\u00a0{4<\/span>,\u00a05<\/span>,\u00a06<\/span>}
second_set\u00a0=\u00a0{1<\/span>,\u00a02<\/span>,\u00a03<\/span>}

first_set.update(second_set)

print(first_set)\u00a0\u00a0#\u00a0{1,\u00a02,\u00a03,\u00a04,\u00a05,\u00a06}<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d81\u3001\u5728\u51fd\u6570\u91cc\u8f93\u51fa\u7ed3\u679c<\/span><\/span><\/p>\n
\n
\n
\n
\n
def<\/span>\u00a0is_positive<\/span>(number)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0print(“Positive”<\/span>\u00a0if<\/span>\u00a0number\u00a0>\u00a00<\/span>\u00a0else<\/span>\u00a0“Negative”<\/span>)\u00a0\u00a0#\u00a0Positive<\/span>


is_positive(-3<\/span>)<\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d82\u3001if\u8bed\u53e5\u4e2d\u7684\u591a\u4e2a\u6761\u4ef6<\/span><\/span><\/p>\n
\n
\n
\n
\n
math_points\u00a0=\u00a051<\/span>
biology_points\u00a0=\u00a078<\/span>
physics_points\u00a0=\u00a056<\/span>
history_points\u00a0=\u00a072<\/span>

my_conditions\u00a0=\u00a0[math_points\u00a0>\u00a050<\/span>,\u00a0biology_points\u00a0>\u00a050<\/span>,
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0physics_points\u00a0>\u00a050<\/span>,\u00a0history_points\u00a0>\u00a050<\/span>]

if<\/span>\u00a0all(my_conditions):
\u00a0\u00a0\u00a0\u00a0print(“Congratulations!\u00a0You\u00a0have\u00a0passed\u00a0all\u00a0of\u00a0the\u00a0exams.”<\/span>)
else<\/span>:
\u00a0\u00a0\u00a0\u00a0print(“I\u00a0am\u00a0sorry,\u00a0but\u00a0it\u00a0seems\u00a0that\u00a0you\u00a0have\u00a0to\u00a0repeat\u00a0at\u00a0least\u00a0one\u00a0exam.”<\/span>)
#\u00a0Congratulations!\u00a0You\u00a0have\u00a0passed\u00a0all\u00a0of\u00a0the\u00a0exams.<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d83\u3001\u5728\u4e00\u4e2aif\u8bed\u53e5\u4e2d\uff0c\u81f3\u5c11\u6ee1\u8db3\u591a\u4e2a\u6761\u4ef6\u4e2d\u7684\u4e00\u4e2a<\/span><\/span><\/p>\n
\n
\n
\n
\n
math_points\u00a0=\u00a040<\/span>
biology_points\u00a0=\u00a078<\/span>
physics_points\u00a0=\u00a056<\/span>
history_points\u00a0=\u00a072<\/span>

my_conditions\u00a0=\u00a0[math_points\u00a0>\u00a050<\/span>,\u00a0biology_points\u00a0>\u00a050<\/span>,
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0physics_points\u00a0>\u00a050<\/span>,\u00a0history_points\u00a0>\u00a050<\/span>]

if<\/span>\u00a0any(my_conditions):
\u00a0\u00a0\u00a0\u00a0print(“Congratulations!\u00a0You\u00a0have\u00a0passed\u00a0all\u00a0of\u00a0the\u00a0exams.”<\/span>)
else<\/span>:
\u00a0\u00a0\u00a0\u00a0print(“I\u00a0am\u00a0sorry,\u00a0but\u00a0it\u00a0seems\u00a0that\u00a0you\u00a0have\u00a0to\u00a0repeat\u00a0at\u00a0least\u00a0one\u00a0exam.”<\/span>)
#\u00a0Congratulations!\u00a0You\u00a0have\u00a0passed\u00a0all\u00a0of\u00a0the\u00a0exams.<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d84\u3001\u4efb\u4f55\u975e\u7a7a\u5b57\u7b26\u4e32\u90fd\u4e3aTrue<\/span><\/span><\/p>\n
\n
\n
\n
\n
print(bool(“Non\u00a0empty”<\/span>))\u00a0\u00a0#\u00a0True<\/span>
print(bool(“”<\/span>))\u00a0\u00a0#\u00a0False<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d85\u3001\u4efb\u4f55\u975e\u7a7a\u5217\u8868\u3001\u5143\u7ec4\u3001\u5b57\u5178\u90fd\u4e3aTrue<\/span><\/span><\/p>\n
\n
\n
\n
\n
print(bool([]))\u00a0\u00a0#\u00a0False<\/span>
print(bool(set([])))\u00a0\u00a0#\u00a0False<\/span>

print(bool({}))\u00a0\u00a0#\u00a0False<\/span>
print(bool({“a”<\/span>:\u00a01<\/span>}))\u00a0\u00a0#\u00a0True<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d86\u3001None\u3001False\u30010\u90fd\u4e3aFalse<\/span><\/span><\/p>\n
\n
\n
\n
\n
print(bool(False<\/span>))\u00a0\u00a0#\u00a0False<\/span>
print(bool(None<\/span>))\u00a0\u00a0#\u00a0False<\/span>
print(bool(0<\/span>))\u00a0\u00a0#\u00a0False<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d87\u3001\u5728\u51fd\u6570\u4e2d\u4f7f\u7528\u5168\u5c40\u53d8\u91cf<\/span><\/span><\/p>\n
\n
\u5728\u51fd\u6570\u65e0\u6cd5\u76f4\u63a5\u4fee\u6539\u5168\u5c40\u53d8\u91cf\u7684\u503c\u3002<\/span><\/p>\n
\n
\n
\n
\n
string\u00a0=\u00a0“string”<\/span>


def<\/span>\u00a0do_nothing<\/span>()<\/span>:<\/span>
\u00a0\u00a0string\u00a0=\u00a0“inside\u00a0a\u00a0method”<\/span>


do_nothing()

print(string)\u00a0\u00a0#\u00a0string<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u53ef\u901a\u8fc7\u4fee\u9970\u7b26global\uff0c\u4fee\u6539\u5168\u5c40\u53d8\u91cf\u7684\u503c\u3002<\/span><\/p>\n
\n
\n
\n
\n
string\u00a0=\u00a0“string”<\/span>


def<\/span>\u00a0do_nothing<\/span>()<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0global<\/span>\u00a0string
\u00a0\u00a0\u00a0\u00a0string\u00a0=\u00a0“inside\u00a0a\u00a0method”<\/span>


do_nothing()

print(string)\u00a0\u00a0#\u00a0inside\u00a0a\u00a0method<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d88\u3001\u8ba1\u7b97\u5b57\u7b26\u4e32\u6216\u5217\u8868\u4e2d\u5143\u7d20\u7684\u6570\u91cf<\/span><\/span><\/p>\n
\n
\u4f7f\u7528collections\u4e2d\u7684Counter\u8ba1\u7b97\u5b57\u7b26\u4e32\u6216\u5217\u8868\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002<\/span><\/p>\n
\n
\n
<\/section>\n
\n
from<\/span>\u00a0collections\u00a0import<\/span>\u00a0Counter

result\u00a0=\u00a0Counter(“Banana”<\/span>)
print(result)\u00a0\u00a0#\u00a0Counter({‘a’:\u00a03,\u00a0‘n’:\u00a02,\u00a0‘B’:\u00a01})<\/span>


result\u00a0=\u00a0Counter([1<\/span>,\u00a02<\/span>,\u00a01<\/span>,\u00a03<\/span>,\u00a01<\/span>,\u00a04<\/span>,\u00a01<\/span>,\u00a05<\/span>,\u00a01<\/span>,\u00a06<\/span>])
print(result)\u00a0\u00a0#\u00a0Counter({1:\u00a05,\u00a02:\u00a01,\u00a03:\u00a01,\u00a04:\u00a01,\u00a05:\u00a01,\u00a06:\u00a01})<\/span><\/section>\n<\/section>\n
\n
\n
\n
\n
\u258d89\u3001\u68c0\u67e52\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u76f8\u540c<\/span><\/span><\/p>\n
\n
\u53ef\u4ee5\u4f7f\u7528Counter()\u65b9\u6cd5\u3002<\/span><\/p>\n
\n
\n
\n
\n
from<\/span>\u00a0collections\u00a0import<\/span>\u00a0Counter


def<\/span>\u00a0check_if_anagram<\/span>(first_string,\u00a0second_string)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0first_string\u00a0=\u00a0first_string.lower()
\u00a0\u00a0\u00a0\u00a0second_string\u00a0=\u00a0second_string.lower()
\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0Counter(first_string)\u00a0==\u00a0Counter(second_string)


print(check_if_anagram(‘testinG’<\/span>,\u00a0‘Testing’<\/span>))\u00a0\u00a0#\u00a0True<\/span>
print(check_if_anagram(‘Here’<\/span>,\u00a0‘Rehe’<\/span>))\u00a0\u00a0#\u00a0True<\/span>
print(check_if_anagram(‘Know’<\/span>,\u00a0‘Now’<\/span>))\u00a0\u00a0#\u00a0False<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u53ef\u4ee5\u4f7f\u7528sorted()\u65b9\u6cd5\u3002<\/span><\/p>\n
\n
\n
\n
\n
def<\/span>\u00a0check_if_anagram<\/span>(first_word,\u00a0second_word)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0first_word\u00a0=\u00a0first_word.lower()
\u00a0\u00a0\u00a0\u00a0second_word\u00a0=\u00a0second_word.lower()
\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0sorted(first_word)\u00a0==\u00a0sorted(second_word)


print(check_if_anagram(“testinG”<\/span>,\u00a0“Testing”<\/span>))\u00a0\u00a0#\u00a0True<\/span>
print(check_if_anagram(“Here”<\/span>,\u00a0“Rehe”<\/span>))\u00a0\u00a0#\u00a0True<\/span>
print(check_if_anagram(“Know”<\/span>,\u00a0“Now”<\/span>))\u00a0\u00a0#\u00a0False<\/span><\/p>\n<\/section>\n
\n
\n
\n
\n
\u258d90\u3001\u4f7f\u7528itertools\u4e2d\u7684count\u8ba1\u7b97\u5143\u7d20\u7684\u6570\u91cf<\/span><\/span><\/p>\n
\n
\n
\n
\n
from<\/span>\u00a0itertools\u00a0import<\/span>\u00a0count

my_vowels\u00a0=\u00a0[‘a’<\/span>,\u00a0‘e’<\/span>,\u00a0‘i’<\/span>,\u00a0‘o’<\/span>,\u00a0‘u’<\/span>,\u00a0‘A’<\/span>,\u00a0‘E’<\/span>,\u00a0‘I’<\/span>,\u00a0‘O’<\/span>,\u00a0‘U’<\/span>]

current_counter\u00a0=\u00a0count()

string\u00a0=\u00a0“This\u00a0is\u00a0just\u00a0a\u00a0sentence.”<\/span>

for<\/span>\u00a0i\u00a0in<\/span>\u00a0string:
\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0i\u00a0in<\/span>\u00a0my_vowels:
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0print(f”Current\u00a0vowel:\u00a0{i}<\/span>“<\/span>)
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0print(f”Number\u00a0of\u00a0vowels\u00a0found\u00a0so\u00a0far:\u00a0{next(current_counter)}<\/span>“<\/span>)<\/p>\n<\/section>\n
\n
\n
\u8f93\u51fa\u5982\u4e0b\u3002<\/span><\/p>\n
\n
\n
\n
Current\u00a0vowel:\u00a0i
Number\u00a0of\u00a0vowels\u00a0found\u00a0so\u00a0far:\u00a00<\/span>
Current\u00a0vowel:\u00a0i
Number\u00a0of\u00a0vowels\u00a0found\u00a0so\u00a0far:\u00a01<\/span>
Current\u00a0vowel:\u00a0u
Number\u00a0of\u00a0vowels\u00a0found\u00a0so\u00a0far:\u00a02<\/span>
Current\u00a0vowel:\u00a0a
Number\u00a0of\u00a0vowels\u00a0found\u00a0so\u00a0far:\u00a03<\/span>
Current\u00a0vowel:\u00a0e
Number\u00a0of\u00a0vowels\u00a0found\u00a0so\u00a0far:\u00a04<\/span>
Current\u00a0vowel:\u00a0e
Number\u00a0of\u00a0vowels\u00a0found\u00a0so\u00a0far:\u00a05<\/span>
Current\u00a0vowel:\u00a0e
Number\u00a0of\u00a0vowels\u00a0found\u00a0so\u00a0far:\u00a06<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u258d91\u3001\u5bf9\u5b57\u7b26\u4e32\u6216\u5217\u8868\u7684\u5143\u7d20\u8fdb\u884c\u6b21\u6570\u6392\u5e8f<\/span><\/span><\/p>\n
\n
collections\u6a21\u5757\u7684Counter()\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u662f\u4e0d\u4f1a\u6839\u636e\u5143\u7d20\u7684\u9891\u7387\u5bf9\u5b83\u4eec\u8fdb\u884c\u6392\u5e8f\u7684\u3002<\/span><\/p>\n
\n
\n
\n
from<\/span>\u00a0collections\u00a0import<\/span>\u00a0Counter

result\u00a0=\u00a0Counter([1<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a02<\/span>,\u00a02<\/span>,\u00a02<\/span>,\u00a02<\/span>])
print(result)\u00a0\u00a0#\u00a0Counter({2:\u00a05,\u00a01:\u00a01,\u00a03:\u00a01})<\/span>
print(result.most_common())\u00a0\u00a0#\u00a0[(2,\u00a05),\u00a0(1,\u00a01),\u00a0(3,\u00a01)]<\/span><\/p>\n<\/section>\n
\n
map()\u51fd\u6570\u5c06\u7ed9\u5b9a\u51fd\u6570\u5e94\u7528\u4e8e\u53ef\u8fed\u4ee3\u5bf9\u8c61(\u5217\u8868\u3001\u5143\u7ec4\u7b49)\uff0c\u7136\u540e\u8fd4\u56de\u7ed3\u679c(map\u5bf9\u8c61)\u3002<\/span><\/p>\n
\n
\u258d92\u3001\u67e5\u627e\u5217\u8868\u4e2d\u51fa\u73b0\u9891\u7387\u6700\u9ad8\u7684\u5143\u7d20<\/span><\/span><\/p>\n
\n
\n
\n
my_list\u00a0=\u00a0[‘1’<\/span>,\u00a01<\/span>,\u00a00<\/span>,\u00a0‘a’<\/span>,\u00a0‘b’<\/span>,\u00a02<\/span>,\u00a0‘a’<\/span>,\u00a0‘c’<\/span>,\u00a0‘a’<\/span>]

print(max(set(my_list),\u00a0key=my_list.count))\u00a0\u00a0#\u00a0a<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u258d93\u3001copy()\u548cdeepcopy()\u7684\u533a\u522b<\/span><\/span><\/p>\n
\n
\u6d45\u62f7\u8d1d: \u62f7\u8d1d\u7236\u5bf9\u8c61\uff0c\u4f46\u662f\u4e0d\u4f1a\u62f7\u8d1d\u5bf9\u8c61\u7684\u5185\u90e8\u7684\u5b50\u5bf9\u8c61\u3002<\/span><\/p>\n
\u6df1\u62f7\u8d1d: \u62f7\u8d1d\u7236\u5bf9\u8c61. \u4ee5\u53ca\u5176\u5185\u90e8\u7684\u5b50\u5bf9\u8c61\u3002<\/span><\/p>\n
\n
\u4e0b\u9762\u662f\u4e00\u4e2acopy()\u7684\u4f8b\u5b50\u3002<\/span><\/p>\n
\n
\n
\n
first_list\u00a0=\u00a0[[1<\/span>,\u00a02<\/span>,\u00a03<\/span>],\u00a0[‘a’<\/span>,\u00a0‘b’<\/span>,\u00a0‘c’<\/span>]]

second_list\u00a0=\u00a0first_list.copy()

first_list[0<\/span>][2<\/span>]\u00a0=\u00a0831<\/span>

print(first_list)\u00a0\u00a0#\u00a0[[1,\u00a02,\u00a0831],\u00a0[‘a’,\u00a0‘b’,\u00a0‘c’]]<\/span>
print(second_list)\u00a0\u00a0#\u00a0[[1,\u00a02,\u00a0831],\u00a0[‘a’,\u00a0‘b’,\u00a0‘c’]]<\/span><\/p>\n<\/section>\n
\n
\n
\u8fd9\u91cc\u662f\u4e00\u4e2adeepcopy()\u7684\u4f8b\u5b50\u3002<\/span><\/p>\n
\n
\n
\n
import<\/span>\u00a0copy

first_list\u00a0=\u00a0[[1<\/span>,\u00a02<\/span>,\u00a03<\/span>],\u00a0[‘a’<\/span>,\u00a0‘b’<\/span>,\u00a0‘c’<\/span>]]

second_list\u00a0=\u00a0copy.deepcopy(first_list)

first_list[0<\/span>][2<\/span>]\u00a0=\u00a0831<\/span>

print(first_list)\u00a0\u00a0#\u00a0[[1,\u00a02,\u00a0831],\u00a0[‘a’,\u00a0‘b’,\u00a0‘c’]]<\/span>
print(second_list)\u00a0\u00a0#\u00a0[[1,\u00a02,\u00a03],\u00a0[‘a’,\u00a0‘b’,\u00a0‘c’]]<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u258d94\u3001\u8bbf\u95ee\u5b57\u5178\u4e2d\u4e0d\u5b58\u5728\u7684\u952e\u65f6\uff0c\u907f\u514d\u62a5\u9519<\/span><\/span><\/p>\n
\n
\u5982\u679c\u4f60\u60f3\u8bbf\u95ee\u5b57\u5178\u4e00\u4e2a\u4e0d\u5b58\u5728\u7684\u952e\uff0c\u4ee3\u7801\u4f1a\u62a5\u9519\u3002<\/span><\/p>\n
\n
\n
\n
my_dictonary\u00a0=\u00a0{“name”<\/span>:\u00a0“Name”<\/span>,\u00a0“surname”<\/span>:\u00a0“Surname”<\/span>}
print(my_dictonary[“age”<\/span>])<\/p>\n<\/section>\n
\n
\n
\u9519\u8bef\u5982\u4e0b\u3002<\/span><\/p>\n
\n
\n
\n
KeyError:\u00a0‘age’<\/span><\/p>\n<\/section>\n
\n
\n
\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528defaultdict()\uff0c\u4ee3\u7801\u5c06\u4e0d\u4f1a\u62a5\u9519\u3002<\/span><\/p>\n
\n
\n
\n
from<\/span>\u00a0collections\u00a0import<\/span>\u00a0defaultdict

my_dictonary\u00a0=\u00a0defaultdict(str)
my_dictonary[‘name’<\/span>]\u00a0=\u00a0“Name”<\/span>
my_dictonary[‘surname’<\/span>]\u00a0=\u00a0“Surname”<\/span>

print(my_dictonary[“age”<\/span>])<\/p>\n<\/section>\n
\n
\n
\n
\u258d95\u3001\u6784\u5efa\u8fed\u4ee3\u5668<\/span><\/span><\/p>\n
\n
\n
\n
class<\/span>\u00a0OddNumbers<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0def<\/span>\u00a0__iter__<\/span>(self)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.a\u00a0=\u00a01<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0self

\u00a0\u00a0\u00a0\u00a0def<\/span>\u00a0__next__<\/span>(self)<\/span>:<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0x\u00a0=\u00a0self.a
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0self.a\u00a0+=\u00a02<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0x


odd_numbers_object\u00a0=\u00a0OddNumbers()
iterator\u00a0=\u00a0iter(odd_numbers_object)

print(next(iterator))\u00a0\u00a0#\u00a01<\/span>
print(next(iterator))\u00a0\u00a0#\u00a03<\/span>
print(next(iterator))\u00a0\u00a0#\u00a05<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u258d96\u3001\u5220\u9664\u5217\u8868\u7684\u91cd\u590d\u9879<\/span><\/span><\/p>\n
\n
\n
\n
my_set\u00a0=\u00a0set([1<\/span>,\u00a02<\/span>,\u00a01<\/span>,\u00a02<\/span>,\u00a03<\/span>,\u00a04<\/span>,\u00a05<\/span>])
print(list(my_set))\u00a0\u00a0#\u00a0[1,\u00a02,\u00a03,\u00a04,\u00a05]<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u258d97\u3001\u6253\u5370\u6a21\u5757\u7684\u5b89\u88c5\u4f4d\u7f6e<\/span><\/span><\/p>\n
\n
\n
\n
import<\/span>\u00a0pandas

print(pandas)\u00a0\u00a0#\u00a0<module\u00a0‘torch’\u00a0from\u00a0‘\/Users\/…’<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u258d98\u3001\u4f7f\u7528not in\u68c0\u67e5\u4e00\u4e2a\u503c\u662f\u5426\u5728\u5217\u8868\u4e2d<\/span><\/span><\/p>\n
\n
\n
\n
odd_numbers\u00a0=\u00a0[1<\/span>,\u00a03<\/span>,\u00a05<\/span>,\u00a07<\/span>,\u00a09<\/span>]
even_numbers\u00a0=\u00a0[]

for<\/span>\u00a0i\u00a0in<\/span>\u00a0range(9<\/span>):
\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0i\u00a0not<\/span>\u00a0in<\/span>\u00a0odd_numbers:
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0even_numbers.append(i)

print(even_numbers)\u00a0\u00a0#\u00a0[0,\u00a02,\u00a04,\u00a06,\u00a08]<\/span><\/p>\n<\/section>\n
\n
\n
\n
\u258d99\u3001sort()\u548csorted()\u7684\u533a\u522b<\/span><\/span><\/p>\n
\n
sort()\uff1a\u5bf9\u539f\u59cb\u5217\u8868\u8fdb\u884c\u6392\u5e8f<\/span><\/p>\n
sorted()\uff1a\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u6392\u5e8f\u5217\u8868<\/span><\/p>\n
\n
\n
\n
groceries\u00a0=\u00a0[‘milk’<\/span>,\u00a0‘bread’<\/span>,\u00a0‘tea’<\/span>]

new_groceries\u00a0=\u00a0sorted(groceries)
#\u00a0new_groceries\u00a0=\u00a0[‘bread’,\u00a0‘milk’,\u00a0‘tea’]<\/span>

print(new_groceries)

#\u00a0groceries\u00a0=\u00a0[‘milk’,\u00a0‘bread’,\u00a0‘tea’]<\/span>
print(groceries)

groceries.sort()

#\u00a0groceries\u00a0=\u00a0[‘bread’,\u00a0‘milk’,\u00a0‘tea’]<\/span>
print(groceries)<\/p>\n<\/section>\n
\n
\n
\n
\u258d100\u3001\u4f7f\u7528uuid\u6a21\u5757\u751f\u6210\u552f\u4e00ID<\/span><\/span><\/p>\n
\u00a0<\/span><\/span><\/p>\n
UUID\u4ee3\u8868\u552f\u4e00\u6807\u8bc6\u7b26\u3002<\/span><\/p>\n
\n
\n
\n
import<\/span>\u00a0uuid

#\u00a0\u6839\u636e\u4e3b\u673aID\u3001\u5e8f\u5217\u53f7\u548c\u5f53\u524d\u65f6\u95f4\u751f\u6210UUID<\/span>
print(uuid.uuid1())\u00a0\u00a0#\u00a0308490b6-afe4-11eb-95f7-0c4de9a0c5af<\/span>

#\u00a0\u751f\u6210\u4e00\u4e2a\u968f\u673aUUID<\/span>
print(uuid.uuid4())\u00a0\u00a0#\u00a093bc700b-253e-4081-a358-24b60591076a<\/span><\/p>\n<\/section>\n
\n
\n
\u8f6c\u81ea\uff1ahttps:\/\/mp.weixin.qq.com\/s\/rrRfof70DvpoVw8vyk1xFw<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
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