{"id":1117350,"date":"2025-01-08T18:25:12","date_gmt":"2025-01-08T10:25:12","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1117350.html"},"modified":"2025-01-08T18:25:15","modified_gmt":"2025-01-08T10:25:15","slug":"python%e4%b8%ad%e7%9a%84for%e6%98%af%e5%a6%82%e4%bd%95%e8%af%86%e5%88%ab%e5%88%86%e5%89%b2%e7%9a%84","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1117350.html","title":{"rendered":"python\u4e2d\u7684for\u662f\u5982\u4f55\u8bc6\u522b\u5206\u5272\u7684"},"content":{"rendered":"

\"python\u4e2d\u7684for\u662f\u5982\u4f55\u8bc6\u522b\u5206\u5272\u7684\"<\/p>\n

\u5728Python\u4e2d\uff0cfor<\/code>\u5faa\u73af\u901a\u8fc7\u8fed\u4ee3\u5668\u534f\u8bae\u6765\u8bc6\u522b\u548c\u5904\u7406\u53ef\u8fed\u4ee3\u5bf9\u8c61\u3002Python\u4e2d\u7684for<\/code>\u5faa\u73af\u901a\u8fc7\u8fed\u4ee3\u5668\u534f\u8bae\u3001iter()<\/code>\u51fd\u6570\u3001next()<\/code>\u51fd\u6570\u8bc6\u522b\u5206\u5272\u548c\u904d\u5386\u53ef\u8fed\u4ee3\u5bf9\u8c61<\/strong>\u3002\u8fed\u4ee3\u5668\u534f\u8bae\u662f\u4e00\u79cd\u5bf9\u8c61\u9700\u8981\u5b9e\u73b0\u7684\u534f\u8bae\uff0c\u4ee5\u4fbf\u5bf9\u8c61\u80fd\u591f\u5728for<\/code>\u5faa\u73af\u4e2d\u4f7f\u7528\u3002\u8ba9\u6211\u4eec\u8be6\u7ec6\u63a2\u8ba8\u8fd9\u4e9b\u65b9\u9762\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u8fed\u4ee3\u5668\u534f\u8bae<\/h3>\n<\/p>\n

Python\u4e2d\u7684\u8fed\u4ee3\u5668\u534f\u8bae\u5305\u62ec\u4e24\u4e2a\u4e3b\u8981\u7ec4\u4ef6\uff1a__iter__()<\/code>\u65b9\u6cd5\u548c__next__()<\/code>\u65b9\u6cd5\u3002\u4efb\u4f55\u5b9e\u73b0\u4e86\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u7684\u5bf9\u8c61\u90fd\u88ab\u8ba4\u4e3a\u662f\u53ef\u8fed\u4ee3\u7684\u3002\u8fd9\u4e9b\u65b9\u6cd5\u5141\u8bb8for<\/code>\u5faa\u73af\u904d\u5386\u5bf9\u8c61\u7684\u5143\u7d20\u3002<\/p>\n<\/p>\n

1\u3001__iter__()<\/code>\u65b9\u6cd5<\/h4>\n<\/p>\n

__iter__()<\/code>\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u8fed\u4ee3\u5668\u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u5fc5\u987b\u5b9e\u73b0__next__()<\/code>\u65b9\u6cd5\u3002\u5bf9\u4e8e\u5bb9\u5668\u5bf9\u8c61\uff08\u5982\u5217\u8868\u3001\u5143\u7ec4\u3001\u5b57\u5178\u7b49\uff09\uff0c__iter__()<\/code>\u901a\u5e38\u8fd4\u56de\u81ea\u8eab\u3002<\/p>\n<\/p>\n

2\u3001__next__()<\/code>\u65b9\u6cd5<\/h4>\n<\/p>\n

__next__()<\/code>\u65b9\u6cd5\u8fd4\u56de\u5e8f\u5217\u4e2d\u7684\u4e0b\u4e00\u4e2a\u5143\u7d20\uff0c\u5e76\u5728\u6ca1\u6709\u66f4\u591a\u5143\u7d20\u65f6\u5f15\u53d1StopIteration<\/code>\u5f02\u5e38\u3002\u8fd9\u79cd\u673a\u5236\u5141\u8bb8for<\/code>\u5faa\u73af\u77e5\u9053\u4f55\u65f6\u505c\u6b62\u3002<\/p>\n<\/p>\n

\u4e8c\u3001iter()<\/code>\u51fd\u6570<\/h3>\n<\/p>\n

iter()<\/code>\u51fd\u6570\u662fPython\u7684\u5185\u7f6e\u51fd\u6570\uff0c\u7528\u4e8e\u4ece\u53ef\u8fed\u4ee3\u5bf9\u8c61\u521b\u5efa\u4e00\u4e2a\u8fed\u4ee3\u5668\u3002for<\/code>\u5faa\u73af\u5728\u5176\u80cc\u540e\u5b9e\u9645\u4e0a\u8c03\u7528\u4e86\u8fd9\u4e2a\u51fd\u6570\u6765\u83b7\u53d6\u8fed\u4ee3\u5668\u3002<\/p>\n<\/p>\n

\u4e09\u3001next()<\/code>\u51fd\u6570<\/h3>\n<\/p>\n

next()<\/code>\u51fd\u6570\u4e5f\u662fPython\u7684\u5185\u7f6e\u51fd\u6570\uff0c\u7528\u4e8e\u4ece\u8fed\u4ee3\u5668\u4e2d\u83b7\u53d6\u4e0b\u4e00\u4e2a\u5143\u7d20\u3002for<\/code>\u5faa\u73af\u5728\u6bcf\u6b21\u8fed\u4ee3\u65f6\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u3002<\/p>\n<\/p>\n

\u56db\u3001\u53ef\u8fed\u4ee3\u5bf9\u8c61<\/h3>\n<\/p>\n

\u53ef\u8fed\u4ee3\u5bf9\u8c61\u662f\u5b9e\u73b0\u4e86__iter__()<\/code>\u65b9\u6cd5\u7684\u5bf9\u8c61\u3002\u8fd9\u4e9b\u5bf9\u8c61\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\uff1a\u5217\u8868\u3001\u5143\u7ec4\u3001\u5b57\u5178\u3001\u96c6\u5408\u3001\u5b57\u7b26\u4e32\u3001\u6587\u4ef6\u5bf9\u8c61\u7b49\u3002for<\/code>\u5faa\u73af\u53ef\u4ee5\u904d\u5386\u8fd9\u4e9b\u5bf9\u8c61\uff0c\u56e0\u4e3a\u5b83\u4eec\u5b9e\u73b0\u4e86\u8fed\u4ee3\u5668\u534f\u8bae\u3002<\/p>\n<\/p>\n

1\u3001\u5217\u8868<\/h4>\n<\/p>\n

\u5217\u8868\u662f\u6700\u5e38\u7528\u7684\u53ef\u8fed\u4ee3\u5bf9\u8c61\u4e4b\u4e00\u3002for<\/code>\u5faa\u73af\u53ef\u4ee5\u8f7b\u677e\u904d\u5386\u5217\u8868\u7684\u6bcf\u4e2a\u5143\u7d20\u3002<\/p>\n<\/p>\n

my_list = [1, 2, 3, 4, 5]<\/p>\n
for element in my_list:<\/p>\n
    print(element)<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u5143\u7ec4<\/h4>\n<\/p>\n
\u5143\u7ec4\u4e0e\u5217\u8868\u7c7b\u4f3c\uff0c\u53ea\u4e0d\u8fc7\u5143\u7ec4\u662f\u4e0d\u53ef\u53d8\u7684\u3002<\/p>\n<\/p>\n
my_tuple = (1, 2, 3, 4, 5)<\/p>\n
for element in my_tuple:<\/p>\n
    print(element)<\/p>\n
<\/code><\/pre>\n<\/p>\n
3\u3001\u5b57\u5178<\/h4>\n<\/p>\n
\u5b57\u5178\u662f\u53e6\u4e00\u79cd\u5e38\u89c1\u7684\u53ef\u8fed\u4ee3\u5bf9\u8c61\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cfor<\/code>\u5faa\u73af\u904d\u5386\u5b57\u5178\u7684\u952e\u3002<\/p>\n<\/p>\n
my_dict = {'a': 1, 'b': 2, 'c': 3}<\/p>\n
for key in my_dict:<\/p>\n
    print(key, my_dict[key])<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8981\u904d\u5386\u5b57\u5178\u7684\u503c\u6216\u952e\u503c\u5bf9\uff0c\u53ef\u4ee5\u4f7f\u7528values()<\/code>\u6216items()<\/code>\u65b9\u6cd5\u3002<\/p>\n<\/p>\n
for value in my_dict.values():<\/p>\n
    print(value)<\/p>\n
for key, value in my_dict.items():<\/p>\n
    print(key, value)<\/p>\n
<\/code><\/pre>\n<\/p>\n
4\u3001\u5b57\u7b26\u4e32<\/h4>\n<\/p>\n
\u5b57\u7b26\u4e32\u662f\u4e0d\u53ef\u53d8\u7684\u5b57\u7b26\u5e8f\u5217\uff0c\u4e5f\u662f\u53ef\u8fed\u4ee3\u5bf9\u8c61\u3002<\/p>\n<\/p>\n
my_string = "hello"<\/p>\n
for char in my_string:<\/p>\n
    print(char)<\/p>\n
<\/code><\/pre>\n<\/p>\n
5\u3001\u96c6\u5408<\/h4>\n<\/p>\n
\u96c6\u5408\u662f\u65e0\u5e8f\u7684\u552f\u4e00\u5143\u7d20\u96c6\u5408\uff0c\u4e5f\u662f\u53ef\u8fed\u4ee3\u5bf9\u8c61\u3002<\/p>\n<\/p>\n
my_set = {1, 2, 3, 4, 5}<\/p>\n
for element in my_set:<\/p>\n
    print(element)<\/p>\n
<\/code><\/pre>\n<\/p>\n
6\u3001\u6587\u4ef6\u5bf9\u8c61<\/h4>\n<\/p>\n
\u6587\u4ef6\u5bf9\u8c61\u662f\u53ef\u8fed\u4ee3\u7684\uff0c\u6bcf\u6b21\u8fed\u4ee3\u8fd4\u56de\u6587\u4ef6\u7684\u4e00\u884c\u3002<\/p>\n<\/p>\n
with open('example.txt', 'r') as file:<\/p>\n
    for line in file:<\/p>\n
        print(line, end='')<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e94\u3001\u81ea\u5b9a\u4e49\u53ef\u8fed\u4ee3\u5bf9\u8c61<\/h3>\n<\/p>\n
\u6211\u4eec\u8fd8\u53ef\u4ee5\u521b\u5efa\u81ea\u5b9a\u4e49\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff0c\u53ea\u9700\u5b9e\u73b0__iter__()<\/code>\u548c__next__()<\/code>\u65b9\u6cd5\u3002<\/p>\n<\/p>\n
class MyRange:<\/p>\n
    def __init__(self, start, end):<\/p>\n
        self.start = start<\/p>\n
        self.end = end<\/p>\n
        self.current = start<\/p>\n
    def __iter__(self):<\/p>\n
        return self<\/p>\n
    def __next__(self):<\/p>\n
        if self.current < self.end:<\/p>\n
            num = self.current<\/p>\n
            self.current += 1<\/p>\n
            return num<\/p>\n
        else:<\/p>\n
            rAI<\/a>se StopIteration<\/p>\n
my_range = MyRange(1, 5)<\/p>\n
for num in my_range:<\/p>\n
    print(num)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u516d\u3001\u751f\u6210\u5668<\/h3>\n<\/p>\n
\u751f\u6210\u5668\u662f\u53e6\u4e00\u79cd\u521b\u5efa\u53ef\u8fed\u4ee3\u5bf9\u8c61\u7684\u65b9\u5f0f\u3002\u751f\u6210\u5668\u51fd\u6570\u4f7f\u7528yield<\/code>\u5173\u952e\u5b57\u8fd4\u56de\u503c\uff0c\u5e76\u5728\u6bcf\u6b21\u8c03\u7528\u65f6\u6682\u505c\u548c\u6062\u590d\u5176\u72b6\u6001\u3002<\/p>\n<\/p>\n
def my_generator(start, end):<\/p>\n
    current = start<\/p>\n
    while current < end:<\/p>\n
        yield current<\/p>\n
        current += 1<\/p>\n
for num in my_generator(1, 5):<\/p>\n
    print(num)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u751f\u6210\u5668\u4e0d\u4ec5\u7b80\u5316\u4e86\u8fed\u4ee3\u5668\u7684\u5b9e\u73b0\uff0c\u8fd8\u63d0\u4f9b\u4e86\u66f4\u9ad8\u6548\u7684\u5185\u5b58\u4f7f\u7528\u65b9\u5f0f\uff0c\u56e0\u4e3a\u5b83\u4eec\u6309\u9700\u751f\u6210\u5143\u7d20\uff0c\u800c\u4e0d\u662f\u4e00\u6b21\u6027\u751f\u6210\u6240\u6709\u5143\u7d20\u3002<\/p>\n<\/p>\n
\u4e03\u3001for<\/code>\u5faa\u73af\u7684\u5de5\u4f5c\u539f\u7406<\/h3>\n<\/p>\n
\u73b0\u5728\uff0c\u6211\u4eec\u8be6\u7ec6\u63cf\u8ff0for<\/code>\u5faa\u73af\u7684\u5de5\u4f5c\u539f\u7406\u3002\u5047\u8bbe\u6709\u4e00\u4e2a\u53ef\u8fed\u4ee3\u5bf9\u8c61iterable<\/code>\uff1a<\/p>\n<\/p>\n
for element in iterable:<\/p>\n
    # do something with element<\/p>\n
<\/code><\/pre>\n<\/p>\n
    \n
  1. \u8c03\u7528iter()<\/code>\u51fd\u6570<\/strong>\uff1afor<\/code>\u5faa\u73af\u9996\u5148\u8c03\u7528iter()<\/code>\u51fd\u6570\uff0c\u5c06iterable<\/code>\u5bf9\u8c61\u8f6c\u6362\u4e3a\u8fed\u4ee3\u5668\u3002<\/li>\n
  2. \u8c03\u7528next()<\/code>\u51fd\u6570<\/strong>\uff1a\u7136\u540e\uff0c\u5b83\u5728\u6bcf\u6b21\u8fed\u4ee3\u65f6\u8c03\u7528next()<\/code>\u51fd\u6570\uff0c\u4ece\u8fed\u4ee3\u5668\u4e2d\u83b7\u53d6\u4e0b\u4e00\u4e2a\u5143\u7d20\u3002<\/li>\n
  3. \u5904\u7406StopIteration<\/code>\u5f02\u5e38<\/strong>\uff1a\u5f53next()<\/code>\u51fd\u6570\u5f15\u53d1StopIteration<\/code>\u5f02\u5e38\u65f6\uff0cfor<\/code>\u5faa\u73af\u505c\u6b62\u8fed\u4ee3\u3002<\/li>\n<\/ol>\n
    \u8fd9\u4e2a\u8fc7\u7a0b\u662f\u81ea\u52a8\u8fdb\u884c\u7684\uff0c\u4e0d\u9700\u8981\u7a0b\u5e8f\u5458\u663e\u5f0f\u8c03\u7528\u8fd9\u4e9b\u51fd\u6570\u3002<\/p>\n<\/p>\n
    \u516b\u3001\u5d4c\u5957for<\/code>\u5faa\u73af<\/h3>\n<\/p>\n
    \u6709\u65f6\uff0c\u6211\u4eec\u9700\u8981\u5d4c\u5957for<\/code>\u5faa\u73af\u6765\u904d\u5386\u591a\u7ef4\u6570\u636e\u7ed3\u6784\u3002\u4f8b\u5982\uff0c\u904d\u5386\u77e9\u9635\uff1a<\/p>\n<\/p>\n
    matrix = [<\/p>\n
        [1, 2, 3],<\/p>\n
        [4, 5, 6],<\/p>\n
        [7, 8, 9]<\/p>\n
    ]<\/p>\n
    for row in matrix:<\/p>\n
        for element in row:<\/p>\n
            print(element)<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u5d4c\u5957for<\/code>\u5faa\u73af\u5141\u8bb8\u6211\u4eec\u6df1\u5165\u904d\u5386\u6570\u636e\u7ed3\u6784\u7684\u6bcf\u4e00\u5c42\u3002<\/p>\n<\/p>\n
    \u4e5d\u3001for<\/code>\u5faa\u73af\u4e0ewhile<\/code>\u5faa\u73af\u7684\u5bf9\u6bd4<\/h3>\n<\/p>\n
    \u867d\u7136for<\/code>\u5faa\u73af\u548cwhile<\/code>\u5faa\u73af\u90fd\u53ef\u4ee5\u7528\u6765\u904d\u5386\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff0c\u4f46\u5b83\u4eec\u7684\u4f7f\u7528\u573a\u666f\u7565\u6709\u4e0d\u540c\u3002<\/p>\n<\/p>\n
    1\u3001for<\/code>\u5faa\u73af<\/h4>\n<\/p>\n
    for<\/code>\u5faa\u73af\u901a\u5e38\u7528\u4e8e\u904d\u5386\u5df2\u77e5\u957f\u5ea6\u7684\u53ef\u8fed\u4ee3\u5bf9\u8c61\u3002\u5b83\u7684\u8bed\u6cd5\u7b80\u6d01\uff0c\u5e76\u4e14\u81ea\u52a8\u5904\u7406\u8fed\u4ee3\u7684\u7ec6\u8282\u3002<\/p>\n<\/p>\n
    2\u3001while<\/code>\u5faa\u73af<\/h4>\n<\/p>\n
    while<\/code>\u5faa\u73af\u5219\u66f4\u9002\u5408\u7528\u4e8e\u9700\u8981\u57fa\u4e8e\u67d0\u4e2a\u6761\u4ef6\u8fdb\u884c\u5faa\u73af\u7684\u573a\u666f\u3002\u5b83\u7684\u7075\u6d3b\u6027\u66f4\u9ad8\uff0c\u4f46\u9700\u8981\u663e\u5f0f\u7ba1\u7406\u5faa\u73af\u63a7\u5236\u53d8\u91cf\u3002<\/p>\n<\/p>\n
    # \u4f7f\u7528while\u5faa\u73af\u904d\u5386\u5217\u8868<\/p>\n
    my_list = [1, 2, 3, 4, 5]<\/p>\n
    index = 0<\/p>\n
    while index < len(my_list):<\/p>\n
        print(my_list[index])<\/p>\n
        index += 1<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u5341\u3001for<\/code>\u5faa\u73af\u7684\u9ad8\u7ea7\u7528\u6cd5<\/h3>\n<\/p>\n
    1\u3001\u5217\u8868\u63a8\u5bfc\u5f0f<\/h4>\n<\/p>\n
    \u5217\u8868\u63a8\u5bfc\u5f0f\u662f\u5229\u7528for<\/code>\u5faa\u73af\u7684\u4e00\u79cd\u7b80\u6d01\u65b9\u5f0f\uff0c\u7528\u4e8e\u751f\u6210\u65b0\u5217\u8868\u3002<\/p>\n<\/p>\n
    squares = [x2 for x in range(10)]<\/p>\n
    print(squares)<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    2\u3001\u5b57\u5178\u63a8\u5bfc\u5f0f<\/h4>\n<\/p>\n
    \u7c7b\u4f3c\u4e8e\u5217\u8868\u63a8\u5bfc\u5f0f\uff0c\u5b57\u5178\u63a8\u5bfc\u5f0f\u7528\u4e8e\u751f\u6210\u65b0\u5b57\u5178\u3002<\/p>\n<\/p>\n
    squares_dict = {x: x2 for x in range(10)}<\/p>\n
    print(squares_dict)<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    3\u3001\u96c6\u5408\u63a8\u5bfc\u5f0f<\/h4>\n<\/p>\n
    \u96c6\u5408\u63a8\u5bfc\u5f0f\u7528\u4e8e\u751f\u6210\u65b0\u96c6\u5408\u3002<\/p>\n<\/p>\n
    squares_set = {x2 for x in range(10)}<\/p>\n
    print(squares_set)<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    4\u3001\u751f\u6210\u5668\u8868\u8fbe\u5f0f<\/h4>\n<\/p>\n
    \u751f\u6210\u5668\u8868\u8fbe\u5f0f\u7c7b\u4f3c\u4e8e\u5217\u8868\u63a8\u5bfc\u5f0f\uff0c\u4f46\u8fd4\u56de\u7684\u662f\u751f\u6210\u5668\u5bf9\u8c61\u3002<\/p>\n<\/p>\n
    squares_gen = (x2 for x in range(10))<\/p>\n
    for num in squares_gen:<\/p>\n
        print(num)<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u751f\u6210\u5668\u8868\u8fbe\u5f0f\u63d0\u4f9b\u4e86\u4e00\u79cd\u9ad8\u6548\u7684\u65b9\u5f0f\u6765\u751f\u6210\u5927\u91cf\u6570\u636e\uff0c\u800c\u4e0d\u4f1a\u5360\u7528\u592a\u591a\u5185\u5b58\u3002<\/p>\n<\/p>\n
    \u5341\u4e00\u3001enumerate()<\/code>\u51fd\u6570<\/h3>\n<\/p>\n
    enumerate()<\/code>\u51fd\u6570\u4e3afor<\/code>\u5faa\u73af\u63d0\u4f9b\u7d22\u5f15\u548c\u503c\uff0c\u5b83\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u7d22\u5f15\u548c\u503c\u7684\u5143\u7ec4\u3002<\/p>\n<\/p>\n
    my_list = ['a', 'b', 'c']<\/p>\n
    for index, value in enumerate(my_list):<\/p>\n
        print(index, value)<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u5341\u4e8c\u3001zip()<\/code>\u51fd\u6570<\/h3>\n<\/p>\n
    zip()<\/code>\u51fd\u6570\u5c06\u591a\u4e2a\u53ef\u8fed\u4ee3\u5bf9\u8c61\u6253\u5305\u6210\u4e00\u4e2a\u5143\u7ec4\u7684\u8fed\u4ee3\u5668\uff0c\u65b9\u4fbf\u540c\u65f6\u904d\u5386\u591a\u4e2a\u5bf9\u8c61\u3002<\/p>\n<\/p>\n
    list1 = [1, 2, 3]<\/p>\n
    list2 = ['a', 'b', 'c']<\/p>\n
    for num, char in zip(list1, list2):<\/p>\n
        print(num, char)<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u5341\u4e09\u3001for-else<\/code>\u7ed3\u6784<\/h3>\n<\/p>\n
    for-else<\/code>\u7ed3\u6784\u5728for<\/code>\u5faa\u73af\u6b63\u5e38\u5b8c\u6210\u540e\u6267\u884celse<\/code>\u5757\u3002\u5982\u679cfor<\/code>\u5faa\u73af\u88abbreak<\/code>\u7ec8\u6b62\uff0celse<\/code>\u5757\u5c06\u4e0d\u4f1a\u6267\u884c\u3002<\/p>\n<\/p>\n
    for num in range(10):<\/p>\n
        if num == 5:<\/p>\n
            break<\/p>\n
    else:<\/p>\n
        print("Loop completed without break")<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u7531\u4e8efor<\/code>\u5faa\u73af\u5728num<\/code>\u7b49\u4e8e5\u65f6\u88abbreak<\/code>\u7ec8\u6b62\uff0c\u56e0\u6b64else<\/code>\u5757\u4e0d\u4f1a\u6267\u884c\u3002<\/p>\n<\/p>\n
    \u5341\u56db\u3001for<\/code>\u5faa\u73af\u7684\u6700\u4f73\u5b9e\u8df5<\/h3>\n<\/p>\n
    1\u3001\u907f\u514d\u4fee\u6539\u6b63\u5728\u8fed\u4ee3\u7684\u5e8f\u5217<\/h4>\n<\/p>\n
    \u5728\u8fed\u4ee3\u5e8f\u5217\u65f6\uff0c\u907f\u514d\u4fee\u6539\u5e8f\u5217\u7684\u957f\u5ea6\u6216\u5185\u5bb9\uff0c\u56e0\u4e3a\u8fd9\u4f1a\u5bfc\u81f4\u672a\u5b9a\u4e49\u7684\u884c\u4e3a\u3002<\/p>\n<\/p>\n
    # \u9519\u8bef\u793a\u4f8b<\/p>\n
    my_list = [1, 2, 3, 4, 5]<\/p>\n
    for i in my_list:<\/p>\n
        if i == 3:<\/p>\n
            my_list.remove(i)<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    2\u3001\u4f7f\u7528\u751f\u6210\u5668\u548c\u63a8\u5bfc\u5f0f\u63d0\u9ad8\u6548\u7387<\/h4>\n<\/p>\n
    \u751f\u6210\u5668\u548c\u63a8\u5bfc\u5f0f\u63d0\u4f9b\u4e86\u4e00\u79cd\u9ad8\u6548\u7684\u65b9\u5f0f\u6765\u5904\u7406\u5927\u91cf\u6570\u636e\uff0c\u5e76\u4e14\u4f7f\u4ee3\u7801\u66f4\u7b80\u6d01\u3002<\/p>\n<\/p>\n
    3\u3001\u9009\u62e9\u5408\u9002\u7684\u6570\u636e\u7ed3\u6784<\/h4>\n<\/p>\n
    \u6839\u636e\u9700\u8981\u9009\u62e9\u5408\u9002\u7684\u6570\u636e\u7ed3\u6784\uff08\u5982\u5217\u8868\u3001\u5b57\u5178\u3001\u96c6\u5408\u7b49\uff09\uff0c\u4ee5\u4fbf\u66f4\u9ad8\u6548\u5730\u8fdb\u884c\u8fed\u4ee3\u3002<\/p>\n<\/p>\n
    4\u3001\u4f7f\u7528\u5185\u7f6e\u51fd\u6570\u548c\u5e93<\/h4>\n<\/p>\n
    Python\u63d0\u4f9b\u4e86\u8bb8\u591a\u5185\u7f6e\u51fd\u6570\u548c\u5e93\uff08\u5982enumerate()<\/code>, zip()<\/code>\u7b49\uff09\uff0c\u53ef\u4ee5\u7b80\u5316\u8fed\u4ee3\u8fc7\u7a0b\u5e76\u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027\u3002<\/p>\n<\/p>\n
    \u5341\u4e94\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
    Python\u4e2d\u7684for<\/code>\u5faa\u73af\u901a\u8fc7\u8fed\u4ee3\u5668\u534f\u8bae\u3001iter()<\/code>\u51fd\u6570\u548cnext()<\/code>\u51fd\u6570\u6765\u8bc6\u522b\u548c\u5904\u7406\u53ef\u8fed\u4ee3\u5bf9\u8c61\u3002\u8fed\u4ee3\u5668\u534f\u8bae\u5305\u62ec__iter__()<\/code>\u548c__next__()<\/code>\u65b9\u6cd5\uff0c\u4efb\u4f55\u5b9e\u73b0\u8fd9\u4e9b\u65b9\u6cd5\u7684\u5bf9\u8c61\u90fd\u53ef\u4ee5\u5728for<\/code>\u5faa\u73af\u4e2d\u4f7f\u7528\u3002\u5e38\u89c1\u7684\u53ef\u8fed\u4ee3\u5bf9\u8c61\u5305\u62ec\u5217\u8868\u3001\u5143\u7ec4\u3001\u5b57\u5178\u3001\u5b57\u7b26\u4e32\u3001\u96c6\u5408\u548c\u6587\u4ef6\u5bf9\u8c61\u3002\u6b64\u5916\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u521b\u5efa\u81ea\u5b9a\u4e49\u53ef\u8fed\u4ee3\u5bf9\u8c61\u548c\u751f\u6210\u5668\u3002\u901a\u8fc7\u5408\u7406\u4f7f\u7528for<\/code>\u5faa\u73af\u548c\u76f8\u5173\u6280\u672f\uff0c\u6211\u4eec\u53ef\u4ee5\u9ad8\u6548\u5730\u904d\u5386\u548c\u5904\u7406\u5404\u79cd\u6570\u636e\u7ed3\u6784\u3002<\/p>\n<\/p>\n
    \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
     \u5728Python\u4e2d\uff0cfor\u5faa\u73af\u662f\u5982\u4f55\u5904\u7406\u53ef\u8fed\u4ee3\u5bf9\u8c61\u7684\uff1f<\/strong>
    Python\u4e2d\u7684for\u5faa\u73af\u901a\u8fc7\u8fed\u4ee3\u5668\u534f\u8bae\u6765\u8bc6\u522b\u53ef\u8fed\u4ee3\u5bf9\u8c61\u3002\u8fd9\u610f\u5473\u7740for\u5faa\u73af\u4f1a\u8c03\u7528\u5bf9\u8c61\u7684__iter__()<\/code>\u65b9\u6cd5\u83b7\u53d6\u8fed\u4ee3\u5668\uff0c\u7136\u540e\u4f7f\u7528__next__()<\/code>\u65b9\u6cd5\u9010\u4e00\u8bbf\u95ee\u5bf9\u8c61\u4e2d\u7684\u5143\u7d20\uff0c\u76f4\u5230\u6ca1\u6709\u5143\u7d20\u53ef\u4f9b\u8bbf\u95ee\u4e3a\u6b62\u3002<\/p>\n
    \u4f7f\u7528for\u5faa\u73af\u65f6\uff0c\u5982\u4f55\u907f\u514d\u56e0\u5206\u5272\u800c\u5bfc\u81f4\u7684\u9519\u8bef\uff1f<\/strong>
    \u5f53\u5728for\u5faa\u73af\u4e2d\u5904\u7406\u5206\u5272\u540e\u7684\u6570\u636e\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u5f02\u5e38\u5904\u7406\u6765\u907f\u514d\u9519\u8bef\u3002\u4f8b\u5982\uff0c\u4f7f\u7528try-except\u8bed\u53e5\u6355\u83b7\u53ef\u80fd\u7684IndexError\u6216TypeError\uff0c\u4ee5\u786e\u4fdd\u7a0b\u5e8f\u7684\u7a33\u5b9a\u6027\u3002\u6b64\u5916\uff0c\u786e\u4fdd\u5728\u5206\u5272\u6570\u636e\u524d\u68c0\u67e5\u6570\u636e\u7c7b\u578b\u548c\u5185\u5bb9\u4e5f\u975e\u5e38\u91cd\u8981\uff0c\u4ee5\u51cf\u5c11\u6f5c\u5728\u95ee\u9898\u3002<\/p>\n
    \u5728for\u5faa\u73af\u4e2d\u5982\u4f55\u5904\u7406\u5206\u5272\u7684\u5b57\u7b26\u4e32\uff1f<\/strong>
    \u8981\u5904\u7406\u5206\u5272\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b57\u7b26\u4e32\u7684split()<\/code>\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u5206\u5272\u4e3a\u5217\u8868\uff0c\u7136\u540e\u5728for\u5faa\u73af\u4e2d\u904d\u5386\u8fd9\u4e2a\u5217\u8868\u3002\u4f8b\u5982\uff0c\u4f7f\u7528for word in my_string.split(','):<\/code>\u53ef\u4ee5\u9010\u4e2a\u8bbf\u95ee\u4ee5\u9017\u53f7\u5206\u9694\u7684\u5b57\u7b26\u4e32\u5143\u7d20\uff0c\u4fbf\u4e8e\u8fdb\u4e00\u6b65\u5904\u7406\u3002<\/p>\n
    \u5982\u4f55\u4f7f\u7528for\u5faa\u73af\u904d\u5386\u5b57\u5178\u4e2d\u7684\u952e\u503c\u5bf9\uff1f<\/strong>
    \u904d\u5386\u5b57\u5178\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528items()<\/code>\u65b9\u6cd5\u6765\u83b7\u53d6\u952e\u503c\u5bf9\u3002\u901a\u8fc7for key, value in my_dict.items():<\/code>\u53ef\u4ee5\u540c\u65f6\u8bbf\u95ee\u952e\u548c\u503c\uff0c\u8fd9\u5728\u5904\u7406\u6570\u636e\u65f6\u975e\u5e38\u65b9\u4fbf\u3002\u8fd9\u6837\u53ef\u4ee5\u8f7b\u677e\u5730\u5bf9\u5b57\u5178\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0cfor\u5faa\u73af\u901a\u8fc7\u8fed\u4ee3\u5668\u534f\u8bae\u6765\u8bc6\u522b\u548c\u5904\u7406\u53ef\u8fed\u4ee3\u5bf9\u8c61\u3002Python\u4e2d\u7684for\u5faa\u73af\u901a\u8fc7\u8fed\u4ee3\u5668\u534f\u8bae\u3001i […]","protected":false},"author":3,"featured_media":1117358,"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\/1117350"}],"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=1117350"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1117350\/revisions"}],"predecessor-version":[{"id":1117361,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1117350\/revisions\/1117361"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1117358"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1117350"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1117350"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1117350"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}