{"id":302762,"date":"2024-05-20T18:43:35","date_gmt":"2024-05-20T10:43:35","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/302762.html"},"modified":"2024-05-20T18:43:48","modified_gmt":"2024-05-20T10:43:48","slug":"python-%e4%bb%a3%e7%a0%81%e5%a6%82%e4%bd%95%e9%81%8d%e5%8e%86%e4%b8%80%e4%b8%aa%e9%9b%86%e5%90%88%e5%8f%8a%e5%85%b6%e4%b8%8b%e6%a0%87","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/302762.html","title":{"rendered":"python \u4ee3\u7801\u5982\u4f55\u904d\u5386\u4e00\u4e2a\u96c6\u5408\u53ca\u5176\u4e0b\u6807"},"content":{"rendered":"

\"python<\/p>\n

\u5728Python\u4e2d\u904d\u5386\u4e00\u4e2a\u96c6\u5408\u53ca\u5176\u4e0b\u6807\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u5185\u7f6e\u51fd\u6570enumerate()<\/code>\u5b9e\u73b0<\/strong>\u3001\u8fd9\u4e2a\u51fd\u6570\u4f1a\u8fd4\u56de\u6bcf\u4e2a\u5143\u7d20\u7684\u4e0b\u6807\u548c\u503c\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u8fd9\u6837\u4f7f\u7528\u5b83\uff1a<\/p>\n<\/p>\n

for index, value in enumerate(your_collection):<\/p>\n
    # \u5728\u8fd9\u91cc\u5904\u7406\u4e0b\u6807 (index) \u548c\u503c (value)<\/p>\n
<\/code><\/pre>\n<\/p>\n
enumerate()<\/code>\u51fd\u6570\u4e3a\u96c6\u5408\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u63d0\u4f9b\u4e86\u4e24\u4e2a\u4fe1\u606f\uff1a\u5143\u7d20\u7684\u7d22\u5f15\u548c\u5bf9\u5e94\u7684\u503c\uff0c\u8fd9\u8ba9\u6211\u4eec\u5728\u9700\u8981\u540c\u65f6\u8bbf\u95ee\u5b83\u4eec\u7684\u60c5\u51b5\u4e0b\u53d8\u5f97\u975e\u5e38\u65b9\u4fbf\u3002<\/p>\n<\/p>\n
\u4e00\u3001\u4f7f\u7528enumerate()<\/code>\u51fd\u6570<\/h3>\n<\/p>\n
\u4e8c\u3001\u904d\u5386\u5217\u8868<\/h3>\n<\/p>\n
\u5728Python\u4e2d\uff0c\u5217\u8868\u662f\u6700\u5e38\u89c1\u7684\u96c6\u5408\u6570\u636e\u7c7b\u578b\u4e4b\u4e00\u3002\u6211\u4eec\u901a\u5e38\u9700\u8981\u904d\u5386\u5217\u8868\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\uff0c\u4e3a\u4e86\u540c\u65f6\u83b7\u5f97\u5143\u7d20\u7684\u7d22\u5f15\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528enumerate()<\/code>\u51fd\u6570\u3002<\/p>\n<\/p>\n
my_list = ["apple", "banana", "cherry"]<\/p>\n
for index, fruit in enumerate(my_list):<\/p>\n
    print(f"Index {index}: {fruit}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u904d\u5386\u5b57\u5178<\/h3>\n<\/p>\n
\u5b57\u5178\u5728Python\u4e2d\u7528\u4e8e\u5b58\u50a8\u952e\u503c\u5bf9\u3002\u5c3d\u7ba1enumerate()<\/code>\u901a\u5e38\u7528\u4e8e\u5e8f\u5217\u7c7b\u578b\uff0c\u5982\u5217\u8868\u6216\u5143\u7ec4\uff0c\u4f46\u4e5f\u53ef\u4ee5\u5728\u5c06\u5b57\u5178\u8f6c\u6362\u4e3a\u53ef\u8fed\u4ee3\u7684\u9879\u5e8f\u5217\u65f6\u4f7f\u7528\u3002<\/p>\n<\/p>\n
my_dict = {'a': 1, 'b': 2, 'c': 3}<\/p>\n
for index, (key, value) in enumerate(my_dict.items()):<\/p>\n
    print(f"Index {index}: Key {key}, Value {value}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u904d\u5386\u5b57\u7b26\u4e32<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u4e5f\u53ef\u4ee5\u89c6\u4e3a\u5b57\u7b26\u7684\u96c6\u5408\uff0c\u4f7f\u7528enumerate()<\/code>\u53ef\u4ee5\u5728\u8fed\u4ee3\u5b57\u7b26\u4e32\u65f6\u83b7\u5f97\u5b57\u7b26\u4f4d\u7f6e\u3002<\/p>\n<\/p>\n
my_string = "Hello"<\/p>\n
for index, char in enumerate(my_string):<\/p>\n
    print(f"Index {index}: Character {char}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e94\u3001\u904d\u5386\u81ea\u5b9a\u4e49\u5bf9\u8c61<\/h3>\n<\/p>\n
\u5982\u679c\u4f60\u6709\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684\u96c6\u5408\u5bf9\u8c61\uff0c\u4f60\u9700\u8981\u786e\u4fdd\u5b83\u662f\u53ef\u8fed\u4ee3\u7684\u3002\u4e00\u65e6\u4f60\u7684\u5bf9\u8c61\u5b9e\u73b0\u4e86\u8fed\u4ee3\u534f\u8bae\uff0c\u4f60\u5c31\u53ef\u4ee5\u4f7f\u7528enumerate()<\/code>\u3002<\/p>\n<\/p>\n
class MyCollection:<\/p>\n
    def __init__(self, elements):<\/p>\n
        self.elements = elements<\/p>\n
    def __iter__(self):<\/p>\n
        return iter(self.elements)<\/p>\n
my_collection = MyCollection(["a", "b", "c"])<\/p>\n
for index, item in enumerate(my_collection):<\/p>\n
    print(f"Index {index}: Item {item}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u516d\u3001\u9ad8\u7ea7\u7528\u9014<\/h3>\n<\/p>\n
enumerate()<\/code>\u51fd\u6570\u8fd8\u53ef\u63a5\u53d7\u4e00\u4e2a\u53ef\u9009\u7684\u53c2\u6570\u6765\u6307\u5b9a\u8d77\u59cb\u7d22\u5f15\u3002\u8fd9\u5728\u67d0\u4e9b\u60c5\u5883\u4e0b\u5f88\u6709\u7528\uff0c\u6bd4\u5982\uff0c\u4ece\u975e\u96f6\u57fa\u7d22\u5f15\u7684\u96c6\u5408\u5f00\u59cb\u3002<\/p>\n<\/p>\n
my_list = ['item1', 'item2', 'item3']<\/p>\n
for index, item in enumerate(my_list, start=1):<\/p>\n
    print(f"Position {index}: {item}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e03\u3001\u904d\u5386\u591a\u4e2a\u96c6\u5408<\/h3>\n<\/p>\n
\u6709\u65f6\u4f60\u53ef\u80fd\u9700\u8981\u540c\u65f6\u904d\u5386\u591a\u4e2a\u96c6\u5408\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528zip()<\/code>\u4e0eenumerate()<\/code>\u7ed3\u5408\u5b9e\u73b0\u3002<\/p>\n<\/p>\n
list1 = ["a", "b", "c"]<\/p>\n
list2 = [10, 20, 30]<\/p>\n
for index, (item1, item2) in enumerate(zip(list1, list2)):<\/p>\n
    print(f"Index {index}: Item1 {item1}, Item2 {item2}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4ee5\u4e0a\u4ecb\u7ecd\u7684\u65b9\u6cd5\uff0c\u65e0\u8bba\u662f\u5728\u6570\u636e\u5904\u7406\u3001\u673a\u5668\u5b66\u4e60<\/a>\u6570\u636e\u96c6\u7684\u7ba1\u7406\u3001Web\u5f00\u53d1\u4e2d\u5904\u7406\u8868\u5355\u6570\u636e\u8fd8\u662f\u5176\u4ed6\u4efb\u610f\u9700\u8981\u7d22\u5f15\u4fe1\u606f\u7684\u573a\u666f\u4e2d\uff0c\u90fd\u662f\u975e\u5e38\u5b9e\u7528\u7684\u6280\u5de7\u3002\u638c\u63e1\u8fd9\u4e9b\u6280\u672f\u80fd\u591f\u5927\u5927\u63d0\u9ad8Python\u7f16\u7a0b\u7684\u7075\u6d3b\u6027\u548c\u6548\u7387\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u5982\u4f55\u5728 Python \u4e2d\u904d\u5386\u96c6\u5408\u5143\u7d20\u5e76\u83b7\u53d6\u4e0b\u6807\uff1f<\/strong><\/p>\n
\u904d\u5386\u4e00\u4e2a\u96c6\u5408\u5e76\u83b7\u53d6\u6bcf\u4e2a\u5143\u7d20\u7684\u4e0b\u6807\u53ef\u4ee5\u4f7f\u7528 enumerate()<\/code> \u51fd\u6570\u3002\u8fd9\u4e2a\u51fd\u6570\u4f1a\u8fd4\u56de\u4e00\u4e2a\u8fed\u4ee3\u5668\u5bf9\u8c61\uff0c\u5305\u542b\u6bcf\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u548c\u5bf9\u5e94\u7684\u503c\u3002\u4f60\u53ef\u4ee5\u7528\u4e00\u4e2a for \u5faa\u73af\u6765\u904d\u5386\u8fd9\u4e2a\u8fed\u4ee3\u5668\uff0c\u5e76\u901a\u8fc7\u89e3\u5305\u64cd\u4f5c\u5c06\u7d22\u5f15\u548c\u503c\u5206\u522b\u8d4b\u7ed9\u4e24\u4e2a\u53d8\u91cf\u3002<\/p>\n
\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
my_list = ['apple', 'banana', 'orange']\nfor index, value in enumerate(my_list):\n    print(f"The element at index {index} is {value}.")\n<\/code><\/pre>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n
The element at index 0 is apple.\nThe element at index 1 is banana.\nThe element at index 2 is orange.\n<\/code><\/pre>\n
2. \u5728 Python \u4e2d\u600e\u6837\u904d\u5386\u4e00\u4e2a\u96c6\u5408\u5e76\u540c\u65f6\u83b7\u53d6\u5143\u7d20\u4e0b\u6807\u548c\u503c\u7684\u5bf9\u5e94\u5173\u7cfb\uff1f<\/strong><\/p>\n
\u5982\u679c\u4f60\u9700\u8981\u540c\u65f6\u83b7\u53d6\u5143\u7d20\u4e0b\u6807\u548c\u5bf9\u5e94\u7684\u503c\uff0c\u5e76\u5c06\u5b83\u4eec\u6620\u5c04\u5230\u4e00\u4e2a\u5b57\u5178\u6216\u5176\u4ed6\u6570\u636e\u7ed3\u6784\u4e2d\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u5b57\u5178\u63a8\u5bfc\u5f0f\uff08dict comprehension\uff09\u6765\u5b9e\u73b0\u3002<\/p>\n
\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
my_list = ['apple', 'banana', 'orange']\nindexed_dict = {index: value for index, value in enumerate(my_list)}\nprint(indexed_dict)\n<\/code><\/pre>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n
{0: 'apple', 1: 'banana', 2: 'orange'}\n<\/code><\/pre>\n
3. \u6211\u5982\u4f55\u5728 Python \u4e2d\u904d\u5386\u4e00\u4e2a\u96c6\u5408\u7684\u5143\u7d20\uff0c\u4f46\u8df3\u8fc7\u67d0\u4e2a\u7279\u5b9a\u4e0b\u6807\uff1f<\/strong><\/p>\n
\u5982\u679c\u4f60\u60f3\u5728\u904d\u5386\u96c6\u5408\u65f6\u8df3\u8fc7\u67d0\u4e2a\u7279\u5b9a\u7684\u4e0b\u6807\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 continue<\/code> \u8bed\u53e5\u6765\u5b9e\u73b0\u3002 continue<\/code> \u8bed\u53e5\u4f1a\u8df3\u8fc7\u5f53\u524d\u8fed\u4ee3\u7684\u5269\u4f59\u4ee3\u7801\uff0c\u76f4\u63a5\u8fdb\u5165\u4e0b\u4e00\u6b21\u8fed\u4ee3\u3002<\/p>\n
\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
my_list = ['apple', 'banana', 'orange', 'mango']\nskip_index = 1\nfor index, value in enumerate(my_list):\n    if index == skip_index:\n        continue\n    print(f"The element at index {index} is {value}.")\n<\/code><\/pre>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n
The element at index 0 is apple.\nThe element at index 2 is orange.\nThe element at index 3 is mango.\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\u904d\u5386\u4e00\u4e2a\u96c6\u5408\u53ca\u5176\u4e0b\u6807\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u5185\u7f6e\u51fd\u6570enumerate()\u5b9e\u73b0\u3001\u8fd9\u4e2a\u51fd\u6570\u4f1a\u8fd4\u56de\u6bcf\u4e2a\u5143\u7d20\u7684\u4e0b […]","protected":false},"author":3,"featured_media":302787,"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\/302762"}],"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=302762"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/302762\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/302787"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=302762"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=302762"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=302762"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}