{"id":1155018,"date":"2025-01-13T17:58:15","date_gmt":"2025-01-13T09:58:15","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1155018.html"},"modified":"2025-01-13T17:58:35","modified_gmt":"2025-01-13T09:58:35","slug":"python%e5%a6%82%e4%bd%95%e5%8f%8d%e5%ba%8f%e8%bf%ad%e4%bb%a3%e5%88%97%e8%a1%a8","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1155018.html","title":{"rendered":"python\u5982\u4f55\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868"},"content":{"rendered":"

\"python\u5982\u4f55\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868\"<\/p>\n

Python\u4e2d\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868<\/strong>\uff0c\u4f7f\u7528\u5185\u7f6e\u7684reversed()\u51fd\u6570\u3001\u5207\u7247\u64cd\u4f5c\u3001\u4f7f\u7528for\u5faa\u73af\u7ed3\u5408range()\u51fd\u6570<\/strong>\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5176\u4e2d\u4e00\u79cd\u65b9\u6cd5\uff0c\u5373\u4f7f\u7528\u5185\u7f6e\u7684reversed()<\/code>\u51fd\u6570\u6765\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868\u3002<\/p>\n<\/p>\n

\u4f7f\u7528reversed()\u51fd\u6570<\/strong>\uff1areversed()<\/code>\u51fd\u6570\u662fPython\u5185\u7f6e\u7684\u51fd\u6570\uff0c\u53ef\u4ee5\u76f4\u63a5\u63a5\u53d7\u4e00\u4e2a\u5e8f\u5217\uff08\u5982\u5217\u8868\u3001\u5143\u7ec4\u7b49\uff09\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u53cd\u5411\u8fed\u4ee3\u5668\u3002\u901a\u8fc7\u8be5\u8fed\u4ee3\u5668\uff0c\u53ef\u4ee5\u9010\u4e2a\u8bbf\u95ee\u5e8f\u5217\u4e2d\u7684\u5143\u7d20\uff0c\u4f46\u987a\u5e8f\u662f\u4ece\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u5230\u7b2c\u4e00\u4e2a\u5143\u7d20\u3002\u4f7f\u7528reversed()<\/code>\u51fd\u6570\u7684\u597d\u5904\u662f\u5b83\u4e0d\u9700\u8981\u989d\u5916\u7684\u5185\u5b58\u6765\u5b58\u50a8\u53cd\u5411\u5217\u8868\uff0c\u6548\u7387\u8f83\u9ad8\u3002<\/p>\n<\/p>\n

\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<\/p>\n

my_list = [1, 2, 3, 4, 5]<\/p>\n
for element in reversed(my_list):<\/p>\n
    print(element)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8be5\u4ee3\u7801\u5c06\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
5<\/p>\n
4<\/p>\n
3<\/p>\n
2<\/p>\n
1<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8be6\u7ec6\u4ecb\u7ecd\u5176\u4ed6\u65b9\u6cd5\u4e4b\u524d\uff0c\u8ba9\u6211\u4eec\u5148\u6765\u4e86\u89e3\u5217\u8868\u53cd\u5e8f\u8fed\u4ee3\u7684\u66f4\u591a\u5e94\u7528\u573a\u666f\u548c\u5b9e\u73b0\u7ec6\u8282\u3002<\/p>\n<\/p>\n
\u4e00\u3001\u4f7f\u7528reversed()\u51fd\u6570\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868<\/h2>\n<\/p>\n
1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n
reversed()<\/code>\u51fd\u6570\u662f\u6700\u7b80\u5355\u76f4\u63a5\u7684\u65b9\u6cd5\u4e4b\u4e00\u3002\u5b83\u8fd4\u56de\u4e00\u4e2a\u53cd\u5411\u8fed\u4ee3\u5668\uff0c\u53ef\u4ee5\u7528\u4e8efor\u5faa\u73af\u7b49\u8fed\u4ee3\u573a\u666f\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
my_list = ['a', 'b', 'c', 'd', 'e']<\/p>\n
for element in reversed(my_list):<\/p>\n
    print(element)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
e<\/p>\n
d<\/p>\n
c<\/p>\n
b<\/p>\n
a<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u4e0e\u5176\u4ed6\u51fd\u6570\u7ed3\u5408\u4f7f\u7528<\/h3>\n<\/p>\n
reversed()<\/code>\u51fd\u6570\u8fd4\u56de\u7684\u662f\u4e00\u4e2a\u8fed\u4ee3\u5668\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u53ef\u4ee5\u4e0e\u5176\u4ed6\u51fd\u6570\u7ed3\u5408\u4f7f\u7528\uff0c\u4f8b\u5982list()<\/code>\u51fd\u6570\u5c06\u5176\u8f6c\u6362\u4e3a\u5217\u8868\uff0ctuple()<\/code>\u51fd\u6570\u5c06\u5176\u8f6c\u6362\u4e3a\u5143\u7ec4\u7b49\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
my_list = [10, 20, 30, 40, 50]<\/p>\n
reversed_list = list(reversed(my_list))<\/p>\n
print(reversed_list)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
[50, 40, 30, 20, 10]<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528\u5207\u7247\u64cd\u4f5c\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868<\/h2>\n<\/p>\n
1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n
\u5207\u7247\u64cd\u4f5c\u662fPython\u4e2d\u975e\u5e38\u5f3a\u5927\u7684\u529f\u80fd\uff0c\u901a\u8fc7\u5207\u7247\u64cd\u4f5c\u53ef\u4ee5\u8f7b\u677e\u5b9e\u73b0\u5217\u8868\u7684\u53cd\u5e8f\u8fed\u4ee3\u3002\u5177\u4f53\u505a\u6cd5\u662f\u4f7f\u7528[::-1]<\/code>\u6765\u53cd\u8f6c\u5217\u8868\uff0c\u7136\u540e\u518d\u8fdb\u884c\u8fed\u4ee3\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
for element in my_list[::-1]:<\/p>\n
    print(element)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
5<\/p>\n
4<\/p>\n
3<\/p>\n
2<\/p>\n
1<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u5207\u7247\u7684\u5176\u4ed6\u7528\u6cd5<\/h3>\n<\/p>\n
\u5207\u7247\u4e0d\u4ec5\u53ef\u4ee5\u5b9e\u73b0\u53cd\u8f6c\uff0c\u8fd8\u53ef\u4ee5\u5b9e\u73b0\u66f4\u52a0\u590d\u6742\u7684\u64cd\u4f5c\uff0c\u4f8b\u5982\u53cd\u5411\u6b65\u957f\u3001\u6307\u5b9a\u8d77\u59cb\u548c\u7ed3\u675f\u4f4d\u7f6e\u7b49\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
my_list = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]<\/p>\n
\u4ece\u7b2c8\u4e2a\u5143\u7d20\u5f00\u59cb\u53cd\u5411\u8fed\u4ee3\u5230\u7b2c2\u4e2a\u5143\u7d20\uff08\u4e0d\u5305\u62ec\u7b2c2\u4e2a\u5143\u7d20\uff09<\/strong><\/h2>\n
for element in my_list[8:1:-1]:<\/p>\n
    print(element)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
9<\/p>\n
8<\/p>\n
7<\/p>\n
6<\/p>\n
5<\/p>\n
4<\/p>\n
3<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528for\u5faa\u73af\u7ed3\u5408range()\u51fd\u6570\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868<\/h2>\n<\/p>\n
1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n
\u4f7f\u7528for\u5faa\u73af\u7ed3\u5408range()<\/code>\u51fd\u6570\u4e5f\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u65b9\u6cd5\u3002\u901a\u8fc7range()<\/code>\u51fd\u6570\u751f\u6210\u4e00\u4e2a\u53cd\u5411\u7684\u7d22\u5f15\u5e8f\u5217\uff0c\u7136\u540e\u4f7f\u7528\u8be5\u5e8f\u5217\u8bbf\u95ee\u5217\u8868\u5143\u7d20\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
my_list = ['apple', 'banana', 'cherry', 'date', 'elderberry']<\/p>\n
for i in range(len(my_list)-1, -1, -1):<\/p>\n
    print(my_list[i])<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
elderberry<\/p>\n
date<\/p>\n
cherry<\/p>\n
banana<\/p>\n
apple<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u4e0eenumerate()\u51fd\u6570\u7ed3\u5408\u4f7f\u7528<\/h3>\n<\/p>\n
enumerate()<\/code>\u51fd\u6570\u53ef\u4ee5\u540c\u65f6\u83b7\u53d6\u5143\u7d20\u7684\u7d22\u5f15\u548c\u503c\uff0c\u7ed3\u5408\u53cd\u5411\u7684range()<\/code>\u51fd\u6570\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5e26\u7d22\u5f15\u7684\u53cd\u5411\u8fed\u4ee3\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
my_list = ['a', 'b', 'c', 'd', 'e']<\/p>\n
for i, element in enumerate(my_list[::-1]):<\/p>\n
    print(f'Index: {len(my_list)-1-i}, Element: {element}')<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
Index: 4, Element: e<\/p>\n
Index: 3, Element: d<\/p>\n
Index: 2, Element: c<\/p>\n
Index: 1, Element: b<\/p>\n
Index: 0, Element: a<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u4f7f\u7528\u9012\u5f52\u65b9\u6cd5\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868<\/h2>\n<\/p>\n
1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n
\u9012\u5f52\u65b9\u6cd5\u4e5f\u662f\u5b9e\u73b0\u5217\u8868\u53cd\u5e8f\u8fed\u4ee3\u7684\u4e00\u79cd\u65b9\u5f0f\u3002\u9012\u5f52\u65b9\u6cd5\u901a\u8fc7\u51fd\u6570\u8c03\u7528\u81ea\u8eab\u6765\u9010\u6b65\u8bbf\u95ee\u5217\u8868\u7684\u5143\u7d20\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
def reverse_iterate(lst, index):<\/p>\n
    if index < 0:<\/p>\n
        return<\/p>\n
    print(lst[index])<\/p>\n
    reverse_iterate(lst, index - 1)<\/p>\n
my_list = [10, 20, 30, 40, 50]<\/p>\n
reverse_iterate(my_list, len(my_list) - 1)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
50<\/p>\n
40<\/p>\n
30<\/p>\n
20<\/p>\n
10<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u9012\u5f52\u7684\u4f18\u5316<\/h3>\n<\/p>\n
\u9012\u5f52\u65b9\u6cd5\u5728\u5904\u7406\u5927\u5217\u8868\u65f6\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6808\u6ea2\u51fa\uff0c\u53ef\u4ee5\u901a\u8fc7\u5c3e\u9012\u5f52\u4f18\u5316\u6216\u8005\u4f7f\u7528\u5176\u4ed6\u65b9\u5f0f\u6765\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u4f7f\u7528\u6808\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868<\/h2>\n<\/p>\n
1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n
\u6808\u662f\u4e00\u79cd\u540e\u8fdb\u5148\u51fa\uff08LIFO\uff09\u7684\u6570\u636e\u7ed3\u6784\uff0c\u53ef\u4ee5\u5229\u7528\u6808\u7684\u7279\u6027\u6765\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
stack = my_list[:]<\/p>\n
while stack:<\/p>\n
    print(stack.pop())<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
5<\/p>\n
4<\/p>\n
3<\/p>\n
2<\/p>\n
1<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u6808\u7684\u6269\u5c55\u5e94\u7528<\/h3>\n<\/p>\n
\u6808\u4e0d\u4ec5\u53ef\u4ee5\u7528\u4e8e\u53cd\u5e8f\u8fed\u4ee3\uff0c\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u5176\u4ed6\u6570\u636e\u7ed3\u6784\u548c\u7b97\u6cd5\uff0c\u4f8b\u5982\u6df1\u5ea6\u4f18\u5148\u641c\u7d22\u7b49\u3002<\/p>\n<\/p>\n
\u516d\u3001\u4f7f\u7528\u53cc\u7aef\u961f\u5217\uff08deque\uff09\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868<\/h2>\n<\/p>\n
1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n
\u53cc\u7aef\u961f\u5217\uff08deque\uff09\u662fcollections\u6a21\u5757\u4e2d\u7684\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u652f\u6301\u5728\u4e24\u7aef\u9ad8\u6548\u5730\u6dfb\u52a0\u548c\u5220\u9664\u5143\u7d20\u3002\u53ef\u4ee5\u901a\u8fc7\u5c06\u5217\u8868\u5143\u7d20\u4f9d\u6b21\u52a0\u5165\u53cc\u7aef\u961f\u5217\uff0c\u7136\u540e\u53cd\u5411\u8fed\u4ee3\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
from collections import deque<\/p>\n
my_list = [10, 20, 30, 40, 50]<\/p>\n
deque_list = deque(my_list)<\/p>\n
while deque_list:<\/p>\n
    print(deque_list.pop())<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
50<\/p>\n
40<\/p>\n
30<\/p>\n
20<\/p>\n
10<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001deque\u7684\u5176\u4ed6\u7528\u6cd5<\/h3>\n<\/p>\n
\u53cc\u7aef\u961f\u5217\u4e0d\u4ec5\u53ef\u4ee5\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\uff0c\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u961f\u5217\u3001\u53cc\u7aef\u961f\u5217\u7b49\u590d\u6742\u6570\u636e\u7ed3\u6784\u3002<\/p>\n<\/p>\n
\u4e03\u3001\u4f7f\u7528\u751f\u6210\u5668\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868<\/h2>\n<\/p>\n
1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n
\u751f\u6210\u5668\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u8fed\u4ee3\u5668\uff0c\u53ef\u4ee5\u901a\u8fc7yield<\/code>\u5173\u952e\u5b57\u5b9e\u73b0\u60f0\u6027\u6c42\u503c\u3002\u901a\u8fc7\u751f\u6210\u5668\uff0c\u53ef\u4ee5\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
def reverse_generator(lst):<\/p>\n
    for i in range(len(lst)-1, -1, -1):<\/p>\n
        yield lst[i]<\/p>\n
my_list = ['a', 'b', 'c', 'd', 'e']<\/p>\n
for element in reverse_generator(my_list):<\/p>\n
    print(element)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
e<\/p>\n
d<\/p>\n
c<\/p>\n
b<\/p>\n
a<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u751f\u6210\u5668\u7684\u6269\u5c55\u5e94\u7528<\/h3>\n<\/p>\n
\u751f\u6210\u5668\u4e0d\u4ec5\u53ef\u4ee5\u7528\u4e8e\u53cd\u5e8f\u8fed\u4ee3\uff0c\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u5176\u4ed6\u60f0\u6027\u6c42\u503c\u7684\u573a\u666f\uff0c\u4f8b\u5982\u5927\u6587\u4ef6\u5904\u7406\u3001\u65e0\u9650\u5e8f\u5217\u751f\u6210\u7b49\u3002<\/p>\n<\/p>\n
\u516b\u3001\u4f7f\u7528itertools\u6a21\u5757\u4e2d\u7684islice()\u51fd\u6570<\/h2>\n<\/p>\n
1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n
itertools<\/code>\u6a21\u5757\u4e2d\u7684islice()<\/code>\u51fd\u6570\u53ef\u4ee5\u5b9e\u73b0\u5bf9\u8fed\u4ee3\u5668\u7684\u5207\u7247\u64cd\u4f5c\uff0c\u901a\u8fc7\u7ed3\u5408reversed()<\/code>\u51fd\u6570\uff0c\u53ef\u4ee5\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
from itertools import islice<\/p>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
for element in islice(reversed(my_list), len(my_list)):<\/p>\n
    print(element)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
5<\/p>\n
4<\/p>\n
3<\/p>\n
2<\/p>\n
1<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001islice\u7684\u5176\u4ed6\u7528\u6cd5<\/h3>\n<\/p>\n
islice()<\/code>\u51fd\u6570\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u66f4\u52a0\u590d\u6742\u7684\u5207\u7247\u64cd\u4f5c\uff0c\u4f8b\u5982\u8df3\u8fc7\u524d\u51e0\u4e2a\u5143\u7d20\u3001\u53d6\u7279\u5b9a\u8303\u56f4\u5185\u7684\u5143\u7d20\u7b49\u3002<\/p>\n<\/p>\n
\u4e5d\u3001\u4f7f\u7528numpy\u5e93\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868<\/h2>\n<\/p>\n
1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n
numpy<\/code>\u5e93\u662fPython\u4e2d\u5f3a\u5927\u7684\u79d1\u5b66\u8ba1\u7b97\u5e93\uff0c\u901a\u8fc7numpy<\/code>\u6570\u7ec4\u7684\u7d22\u5f15\u64cd\u4f5c\uff0c\u53ef\u4ee5\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import numpy as np<\/p>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
np_array = np.array(my_list)<\/p>\n
for element in np_array[::-1]:<\/p>\n
    print(element)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
5<\/p>\n
4<\/p>\n
3<\/p>\n
2<\/p>\n
1<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001numpy\u7684\u6269\u5c55\u5e94\u7528<\/h3>\n<\/p>\n
numpy<\/code>\u5e93\u4e0d\u4ec5\u53ef\u4ee5\u7528\u4e8e\u53cd\u5e8f\u8fed\u4ee3\uff0c\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u77e9\u9635\u8fd0\u7b97\u3001\u7ebf\u6027\u4ee3\u6570\u7b49\u590d\u6742\u7684\u79d1\u5b66\u8ba1\u7b97\u3002<\/p>\n<\/p>\n
\u5341\u3001\u4f7f\u7528pandas\u5e93\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868<\/h2>\n<\/p>\n
1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n
pandas<\/code>\u5e93\u662fPython\u4e2d\u5f3a\u5927\u7684\u6570\u636e\u5206\u6790\u5e93\uff0c\u901a\u8fc7pandas<\/code>\u7684Series<\/code>\u5bf9\u8c61\uff0c\u53ef\u4ee5\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import pandas as pd<\/p>\n
my_list = [10, 20, 30, 40, 50]<\/p>\n
series = pd.Series(my_list)<\/p>\n
for element in series[::-1]:<\/p>\n
    print(element)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
4    50<\/p>\n
3    40<\/p>\n
2    30<\/p>\n
1    20<\/p>\n
0    10<\/p>\n
dtype: int64<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001pandas\u7684\u6269\u5c55\u5e94\u7528<\/h3>\n<\/p>\n
pandas<\/code>\u5e93\u4e0d\u4ec5\u53ef\u4ee5\u7528\u4e8e\u53cd\u5e8f\u8fed\u4ee3\uff0c\u8fd8\u53ef\u4ee5\u7528\u4e8e\u6570\u636e\u6e05\u6d17\u3001\u6570\u636e\u5206\u6790\u7b49\u590d\u6742\u7684\u6570\u636e\u5904\u7406\u64cd\u4f5c\u3002<\/p>\n<\/p>\n
\u5341\u4e00\u3001\u4f7f\u7528sorted()\u51fd\u6570\u7ed3\u5408reverse\u53c2\u6570<\/h2>\n<\/p>\n
1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n
sorted()<\/code>\u51fd\u6570\u53ef\u4ee5\u5bf9\u5e8f\u5217\u8fdb\u884c\u6392\u5e8f\uff0c\u901a\u8fc7\u8bbe\u7f6ereverse=True<\/code>\u53c2\u6570\uff0c\u53ef\u4ee5\u5b9e\u73b0\u53cd\u5e8f\u6392\u5e8f\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
my_list = ['apple', 'banana', 'cherry', 'date', 'elderberry']<\/p>\n
for element in sorted(my_list, reverse=True):<\/p>\n
    print(element)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
elderberry<\/p>\n
date<\/p>\n
cherry<\/p>\n
banana<\/p>\n
apple<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001sorted\u7684\u5176\u4ed6\u7528\u6cd5<\/h3>\n<\/p>\n
sorted()<\/code>\u51fd\u6570\u4e0d\u4ec5\u53ef\u4ee5\u7528\u4e8e\u53cd\u5e8f\u8fed\u4ee3\uff0c\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5bf9\u5e8f\u5217\u8fdb\u884c\u81ea\u5b9a\u4e49\u6392\u5e8f\uff0c\u4f8b\u5982\u6309\u957f\u5ea6\u6392\u5e8f\u3001\u6309\u5b57\u6bcd\u987a\u5e8f\u6392\u5e8f\u7b49\u3002<\/p>\n<\/p>\n
\u5341\u4e8c\u3001\u4f7f\u7528lambda\u51fd\u6570\u7ed3\u5408map()\u51fd\u6570<\/h2>\n<\/p>\n
1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n
\u901a\u8fc7lambda<\/code>\u51fd\u6570\u548cmap()<\/code>\u51fd\u6570\uff0c\u53ef\u4ee5\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
my_list = [1, 2, 3, 4, 5]<\/p>\n
reversed_list = list(map(lambda x: my_list[-x-1], range(len(my_list))))<\/p>\n
for element in reversed_list:<\/p>\n
    print(element)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
5<\/p>\n
4<\/p>\n
3<\/p>\n
2<\/p>\n
1<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001lambda\u548cmap\u7684\u6269\u5c55\u5e94\u7528<\/h3>\n<\/p>\n
lambda<\/code>\u51fd\u6570\u548cmap()<\/code>\u51fd\u6570\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u66f4\u52a0\u590d\u6742\u7684\u6570\u636e\u53d8\u6362\u64cd\u4f5c\uff0c\u4f8b\u5982\u5bf9\u5217\u8868\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u8fdb\u884c\u5e73\u65b9\u3001\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u5904\u7406\u7b49\u3002<\/p>\n<\/p>\n
\u5341\u4e09\u3001\u4f7f\u7528\u53cd\u5411\u5217\u8868\u8fed\u4ee3\u5668\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3<\/h2>\n<\/p>\n
1\u3001\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n
\u901a\u8fc7\u81ea\u5b9a\u4e49\u53cd\u5411\u5217\u8868\u8fed\u4ee3\u5668\uff0c\u53ef\u4ee5\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
class ReverseListIterator:<\/p>\n
    def __init__(self, lst):<\/p>\n
        self.lst = lst<\/p>\n
        self.index = len(lst)<\/p>\n
    def __iter__(self):<\/p>\n
        return self<\/p>\n
    def __next__(self):<\/p>\n
        if self.index == 0:<\/p>\n
            rAI<\/a>se StopIteration<\/p>\n
        self.index -= 1<\/p>\n
        return self.lst[self.index]<\/p>\n
my_list = [10, 20, 30, 40, 50]<\/p>\n
for element in ReverseListIterator(my_list):<\/p>\n
    print(element)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
50<\/p>\n
40<\/p>\n
30<\/p>\n
20<\/p>\n
10<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u53cd\u5411\u5217\u8868\u8fed\u4ee3\u5668\u7684\u6269\u5c55\u5e94\u7528<\/h3>\n<\/p>\n
\u53cd\u5411\u5217\u8868\u8fed\u4ee3\u5668\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u66f4\u52a0\u590d\u6742\u7684\u81ea\u5b9a\u4e49\u8fed\u4ee3\u5668\uff0c\u4f8b\u5982\u53cc\u5411\u8fed\u4ee3\u5668\u3001\u6309\u6761\u4ef6\u8fed\u4ee3\u5668\u7b49\u3002<\/p>\n<\/p>\n
\u603b\u7ed3<\/h2>\n<\/p>\n
\u4ee5\u4e0a\u4ecb\u7ecd\u4e86Python\u4e2d\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868\u7684\u591a\u79cd\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528reversed()\u51fd\u6570\u3001\u5207\u7247\u64cd\u4f5c\u3001for\u5faa\u73af\u7ed3\u5408range()\u51fd\u6570\u3001\u9012\u5f52\u65b9\u6cd5\u3001\u6808\u3001\u53cc\u7aef\u961f\u5217\u3001\u751f\u6210\u5668\u3001itertools\u6a21\u5757\u3001numpy\u5e93\u3001pandas\u5e93\u3001sorted()\u51fd\u6570\u3001lambda\u51fd\u6570\u7ed3\u5408map()\u51fd\u6570\u3001\u81ea\u5b9a\u4e49\u53cd\u5411\u5217\u8868\u8fed\u4ee3\u5668<\/strong>\u7b49\u3002\u4e0d\u540c\u7684\u65b9\u6cd5\u6709\u5404\u81ea\u7684\u4f18\u7f3a\u70b9\u548c\u9002\u7528\u573a\u666f\uff0c\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u6548\u7387\u548c\u53ef\u8bfb\u6027\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u6765\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u4f7f\u7528Python\u4e2d\u7684\u53cd\u5411\u8fed\u4ee3\u5668\u904d\u5386\u5217\u8868\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528reversed()<\/code>\u51fd\u6570\u6765\u521b\u5efa\u4e00\u4e2a\u53cd\u5411\u8fed\u4ee3\u5668\u3002\u901a\u8fc7\u5c06\u5217\u8868\u4f20\u9012\u7ed9reversed()<\/code>\uff0c\u60a8\u53ef\u4ee5\u9010\u4e2a\u8bbf\u95ee\u5143\u7d20\uff0c\u987a\u5e8f\u4e0e\u539f\u5217\u8868\u76f8\u53cd\u3002\u4f8b\u5982\uff1a  <\/p>\n
my_list = [1, 2, 3, 4, 5]\nfor item in reversed(my_list):\n    print(item)\n<\/code><\/pre>\n
\u8fd9\u6bb5\u4ee3\u7801\u5c06\u8f93\u51fa5, 4, 3, 2, 1\uff0c\u663e\u793a\u4e86\u5982\u4f55\u4ece\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u5f00\u59cb\u904d\u5386\u5217\u8868\u3002<\/p>\n
\u5982\u4f55\u5728Python\u4e2d\u4f7f\u7528\u5207\u7247\u53cd\u5411\u5217\u8868\uff1f<\/strong>
\u5207\u7247\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u8f7b\u677e\u53cd\u8f6c\u5217\u8868\u3002\u4f8b\u5982\uff0c\u4f7f\u7528my_list[::-1]<\/code>\u53ef\u4ee5\u5f97\u5230\u4e00\u4e2a\u65b0\u5217\u8868\uff0c\u5176\u5143\u7d20\u987a\u5e8f\u4e0e\u539f\u5217\u8868\u76f8\u53cd\u3002\u8fd9\u6837\u505a\u4e0d\u4f1a\u4fee\u6539\u539f\u5217\u8868\uff0c\u53cd\u800c\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u53cd\u5411\u5217\u8868\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a  <\/p>\n
my_list = [1, 2, 3, 4, 5]\nreversed_list = my_list[::-1]\nprint(reversed_list)  # \u8f93\u51fa [5, 4, 3, 2, 1]\n<\/code><\/pre>\n
\u53cd\u5411\u8fed\u4ee3\u5217\u8868\u65f6\u53ef\u4ee5\u4f7f\u7528\u54ea\u4e9b\u5185\u7f6e\u65b9\u6cd5\uff1f<\/strong>
\u9664\u4e86\u4f7f\u7528reversed()<\/code>\u51fd\u6570\u548c\u5207\u7247\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528for<\/code>\u5faa\u73af\u7ed3\u5408range()<\/code>\u51fd\u6570\u6765\u5b9e\u73b0\u53cd\u5411\u8fed\u4ee3\u3002\u901a\u8fc7\u83b7\u53d6\u5217\u8868\u957f\u5ea6\u5e76\u4ece\u6700\u540e\u4e00\u4e2a\u7d22\u5f15\u5f00\u59cb\uff0c\u60a8\u53ef\u4ee5\u8bbf\u95ee\u6bcf\u4e2a\u5143\u7d20\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a  <\/p>\n
my_list = [1, 2, 3, 4, 5]\nfor i in range(len(my_list) - 1, -1, -1):\n    print(my_list[i])\n<\/code><\/pre>\n
\u8fd9\u79cd\u65b9\u6cd5\u63d0\u4f9b\u4e86\u66f4\u7075\u6d3b\u7684\u63a7\u5236\uff0c\u53ef\u4ee5\u5728\u8fed\u4ee3\u65f6\u4f7f\u7528\u7d22\u5f15\u8fdb\u884c\u5176\u4ed6\u64cd\u4f5c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Python\u4e2d\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u5b9e\u73b0\u53cd\u5e8f\u8fed\u4ee3\u5217\u8868\uff0c\u4f7f\u7528\u5185\u7f6e\u7684reversed()\u51fd\u6570\u3001\u5207\u7247\u64cd\u4f5c\u3001\u4f7f\u7528for\u5faa\u73af\u7ed3 […]","protected":false},"author":3,"featured_media":1155050,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1155018"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1155018"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1155018\/revisions"}],"predecessor-version":[{"id":1155056,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1155018\/revisions\/1155056"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1155050"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1155018"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1155018"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1155018"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}