{"id":1161423,"date":"2025-01-13T19:16:19","date_gmt":"2025-01-13T11:16:19","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1161423.html"},"modified":"2025-01-13T19:16:21","modified_gmt":"2025-01-13T11:16:21","slug":"python%e4%b8%ad%e5%a6%82%e4%bd%95%e8%ae%a1%e7%ae%97%e5%be%aa%e7%8e%af%e6%ac%a1%e6%95%b0","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1161423.html","title":{"rendered":"python\u4e2d\u5982\u4f55\u8ba1\u7b97\u5faa\u73af\u6b21\u6570"},"content":{"rendered":"

\"python\u4e2d\u5982\u4f55\u8ba1\u7b97\u5faa\u73af\u6b21\u6570\"<\/p>\n

\u5728 Python \u4e2d\u8ba1\u7b97\u5faa\u73af\u6b21\u6570\u7684\u65b9\u6cd5\u6709\u5f88\u591a\u79cd\uff0c\u5305\u62ec\u4f7f\u7528\u8ba1\u6570\u5668\u53d8\u91cf\u3001\u5185\u7f6e\u51fd\u6570 enumerate()\u3001\u4ee5\u53ca\u4f7f\u7528\u5e93\u51fd\u6570\u3002\u53ef\u4ee5\u901a\u8fc7\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cf\u5728\u5faa\u73af\u5f00\u59cb\u524d\u521d\u59cb\u5316\u5b83\uff0c\u7136\u540e\u5728\u6bcf\u6b21\u5faa\u73af\u8fed\u4ee3\u4e2d\u9012\u589e\u8fd9\u4e2a\u53d8\u91cf\uff0c\u6765\u8ba1\u7b97\u5faa\u73af\u6b21\u6570\u3002<\/strong><\/p>\n<\/p>\n

\u4f8b\u5982\uff0c\u4f7f\u7528\u8ba1\u6570\u5668\u53d8\u91cf\u662f\u6700\u76f4\u89c2\u548c\u5e38\u7528\u7684\u65b9\u6cd5\u4e4b\u4e00\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/p>\n<\/p>\n

\u4f7f\u7528\u8ba1\u6570\u5668\u53d8\u91cf\uff1a<\/strong><\/p>\n<\/p>\n

\u5728\u5faa\u73af\u5f00\u59cb\u4e4b\u524d\uff0c\u5b9a\u4e49\u5e76\u521d\u59cb\u5316\u4e00\u4e2a\u8ba1\u6570\u5668\u53d8\u91cf\u3002\u5728\u6bcf\u6b21\u5faa\u73af\u8fed\u4ee3\u4e2d\uff0c\u589e\u52a0\u8fd9\u4e2a\u8ba1\u6570\u5668\u53d8\u91cf\u3002\u5faa\u73af\u7ed3\u675f\u540e\uff0c\u8fd9\u4e2a\u8ba1\u6570\u5668\u53d8\u91cf\u5c06\u5305\u542b\u5faa\u73af\u7684\u603b\u6b21\u6570\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n

count = 0<\/p>\n
for i in range(10):<\/p>\n
    count += 1<\/p>\n
print("\u5faa\u73af\u6b21\u6570:", count)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u975e\u5e38\u7b80\u5355\u660e\u4e86\uff0c\u9002\u7528\u4e8e\u4efb\u4f55\u7c7b\u578b\u7684\u5faa\u73af\u7ed3\u6784\uff0c\u6bd4\u5982 for \u5faa\u73af\u548c while \u5faa\u73af\u3002<\/p>\n<\/p>\n
\n
\u4e00\u3001\u4f7f\u7528\u8ba1\u6570\u5668\u53d8\u91cf<\/h3>\n<\/p>\n
1.1 \u9002\u7528\u8303\u56f4\u5e7f\u6cdb<\/h4>\n<\/p>\n
\u4f7f\u7528\u8ba1\u6570\u5668\u53d8\u91cf\u7684\u65b9\u6cd5\u975e\u5e38\u7075\u6d3b\uff0c\u5b83\u4e0d\u4ec5\u9002\u7528\u4e8e for \u5faa\u73af\uff0c\u4e5f\u9002\u7528\u4e8e while \u5faa\u73af\u3002\u5bf9\u4e8e\u4efb\u4f55\u9700\u8981\u8ddf\u8e2a\u5faa\u73af\u6b21\u6570\u7684\u60c5\u51b5\uff0c\u90fd\u53ef\u4ee5\u4f7f\u7528\u8fd9\u79cd\u65b9\u6cd5\u3002<\/p>\n<\/p>\n
count = 0<\/p>\n
while some_condition:<\/p>\n
    count += 1<\/p>\n
    # \u5faa\u73af\u4f53\u4ee3\u7801<\/p>\n
print("\u5faa\u73af\u6b21\u6570:", count)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u7684\u4f18\u70b9\u5728\u4e8e\u5b83\u4e0d\u4f9d\u8d56\u4e8e Python \u7684\u7279\u5b9a\u7279\u6027\u6216\u5e93\uff0c\u53ef\u4ee5\u5728\u4efb\u4f55\u7f16\u7a0b\u73af\u5883\u4e2d\u4f7f\u7528\u3002\u5bf9\u4e8e\u590d\u6742\u7684\u5faa\u73af\u7ed3\u6784\uff0c\u6bd4\u5982\u5d4c\u5957\u5faa\u73af\uff0c\u8ba1\u6570\u5668\u53d8\u91cf\u540c\u6837\u9002\u7528\u3002<\/p>\n<\/p>\n
1.2 \u7ec6\u8282\u63a7\u5236<\/h4>\n<\/p>\n
\u4f7f\u7528\u8ba1\u6570\u5668\u53d8\u91cf\u8fd8\u5141\u8bb8\u4f60\u5728\u5faa\u73af\u8fc7\u7a0b\u4e2d\u8fdb\u884c\u66f4\u591a\u7684\u63a7\u5236\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u6839\u636e\u7279\u5b9a\u7684\u6761\u4ef6\u8c03\u6574\u8ba1\u6570\u5668\u7684\u503c\uff0c\u6216\u8005\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u8df3\u8fc7\u8ba1\u6570\u3002\u8fd9\u5bf9\u4e8e\u590d\u6742\u7684\u7b97\u6cd5\u548c\u903b\u8f91\u6765\u8bf4\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n
count = 0<\/p>\n
for i in range(10):<\/p>\n
    if some_condition:<\/p>\n
        continue  # \u8df3\u8fc7\u5f53\u524d\u5faa\u73af\u8fed\u4ee3<\/p>\n
    count += 1<\/p>\n
print("\u5faa\u73af\u6b21\u6570:", count)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528 enumerate() \u51fd\u6570<\/h3>\n<\/p>\n
2.1 \u7b80\u6d01\u4ee3\u7801<\/h4>\n<\/p>\n
\u5bf9\u4e8e\u7b80\u5355\u7684 for \u5faa\u73af\uff0c\u53ef\u4ee5\u4f7f\u7528 Python \u7684\u5185\u7f6e\u51fd\u6570 enumerate()\u3002\u5b83\u4e0d\u4ec5\u8fd4\u56de\u6bcf\u6b21\u5faa\u73af\u7684\u5143\u7d20\uff0c\u8fd8\u8fd4\u56de\u5143\u7d20\u7684\u7d22\u5f15\uff0c\u8fd9\u4e2a\u7d22\u5f15\u53ef\u4ee5\u7528\u4f5c\u8ba1\u6570\u5668\u3002<\/p>\n<\/p>\n
for count, value in enumerate(iterable):<\/p>\n
    # \u5faa\u73af\u4f53\u4ee3\u7801<\/p>\n
print("\u5faa\u73af\u6b21\u6570:", count + 1)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u7684\u4f18\u70b9\u662f\u4ee3\u7801\u7b80\u6d01\uff0c\u4e0d\u9700\u8981\u624b\u52a8\u7ef4\u62a4\u8ba1\u6570\u5668\u53d8\u91cf\u3002\u7279\u522b\u662f\u5728\u904d\u5386\u5217\u8868\u3001\u5143\u7ec4\u7b49\u53ef\u8fed\u4ee3\u5bf9\u8c61\u65f6\uff0c\u8fd9\u79cd\u65b9\u6cd5\u975e\u5e38\u65b9\u4fbf\u3002<\/p>\n<\/p>\n
2.2 \u53ef\u8bfb\u6027\u5f3a<\/h4>\n<\/p>\n
\u4f7f\u7528 enumerate() \u51fd\u6570\u7684\u4ee3\u7801\u901a\u5e38\u6bd4\u624b\u52a8\u7ef4\u62a4\u8ba1\u6570\u5668\u53d8\u91cf\u7684\u4ee3\u7801\u66f4\u5177\u53ef\u8bfb\u6027\u3002\u5b83\u76f4\u63a5\u5c06\u8ba1\u6570\u5668\u548c\u8fed\u4ee3\u53d8\u91cf\u7ed1\u5b9a\u5728\u4e00\u8d77\uff0c\u4f7f\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u660e\u4e86\u3002<\/p>\n<\/p>\n
for count, value in enumerate(my_list):<\/p>\n
    print(f"\u7b2c {count} \u6b21\u5faa\u73af\uff0c\u5f53\u524d\u503c: {value}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528\u5916\u90e8\u5e93<\/h3>\n<\/p>\n
3.1 itertools \u6a21\u5757<\/h4>\n<\/p>\n
Python \u7684 itertools \u6a21\u5757\u63d0\u4f9b\u4e86\u8bb8\u591a\u9ad8\u6548\u7684\u8fed\u4ee3\u5668\u51fd\u6570\uff0c\u5176\u4e2d\u7684 count() \u51fd\u6570\u53ef\u4ee5\u751f\u6210\u4e00\u4e2a\u65e0\u9650\u7684\u8ba1\u6570\u5668\u3002\u8fd9\u5bf9\u4e8e\u9700\u8981\u7cbe\u786e\u63a7\u5236\u5faa\u73af\u6b21\u6570\u7684\u60c5\u51b5\u7279\u522b\u6709\u7528\u3002<\/p>\n<\/p>\n
import itertools<\/p>\n
counter = itertools.count()<\/p>\n
for value in iterable:<\/p>\n
    print("\u5faa\u73af\u6b21\u6570:", next(counter))<\/p>\n
    # \u5faa\u73af\u4f53\u4ee3\u7801<\/p>\n
<\/code><\/pre>\n<\/p>\n
3.2 pandas \u5e93<\/h4>\n<\/p>\n
\u5bf9\u4e8e\u6570\u636e\u5206\u6790\u4efb\u52a1\uff0cpandas \u5e93\u63d0\u4f9b\u4e86\u8bb8\u591a\u4fbf\u6377\u7684\u5de5\u5177\u3002\u4f8b\u5982\uff0c\u5728\u5904\u7406\u6570\u636e\u5e27\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528 pandas \u7684\u5185\u7f6e\u65b9\u6cd5\u6765\u8ba1\u7b97\u5faa\u73af\u6b21\u6570\u3002<\/p>\n<\/p>\n
import pandas as pd<\/p>\n
df = pd.DataFrame(data)<\/p>\n
for count, row in df.iterrows():<\/p>\n
    print("\u5faa\u73af\u6b21\u6570:", count)<\/p>\n
    # \u5faa\u73af\u4f53\u4ee3\u7801<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u5176\u4ed6\u65b9\u6cd5<\/h3>\n<\/p>\n
4.1 \u4f7f\u7528 range() \u51fd\u6570<\/h4>\n<\/p>\n
\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528 range() \u51fd\u6570\u6765\u63a7\u5236\u5faa\u73af\u6b21\u6570\u3002\u4f8b\u5982\uff0c\u5f53\u4f60\u786e\u5207\u77e5\u9053\u5faa\u73af\u9700\u8981\u6267\u884c\u7684\u6b21\u6570\u65f6\uff0c\u53ef\u4ee5\u5c06 range() \u51fd\u6570\u7684\u7ed3\u679c\u76f4\u63a5\u7528\u4e8e for \u5faa\u73af\u3002<\/p>\n<\/p>\n
for count in range(10):<\/p>\n
    # \u5faa\u73af\u4f53\u4ee3\u7801<\/p>\n
print("\u5faa\u73af\u6b21\u6570:", count + 1)<\/p>\n
<\/code><\/pre>\n<\/p>\n
4.2 \u4f7f\u7528\u96c6\u5408\u6216\u5b57\u5178<\/h4>\n<\/p>\n
\u5728\u5904\u7406\u96c6\u5408\u6216\u5b57\u5178\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7\u904d\u5386\u952e\u6216\u503c\u6765\u8ba1\u7b97\u5faa\u73af\u6b21\u6570\u3002\u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u5bf9\u952e\u503c\u5bf9\u8fdb\u884c\u64cd\u4f5c\u7684\u60c5\u51b5\u3002<\/p>\n<\/p>\n
my_dict = {'a': 1, 'b': 2, 'c': 3}<\/p>\n
count = 0<\/p>\n
for key, value in my_dict.items():<\/p>\n
    count += 1<\/p>\n
    # \u5faa\u73af\u4f53\u4ee3\u7801<\/p>\n
print("\u5faa\u73af\u6b21\u6570:", count)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e94\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
\u8ba1\u7b97\u5faa\u73af\u6b21\u6570\u662f\u7f16\u7a0b\u4e2d\u5e38\u89c1\u7684\u9700\u6c42\uff0cPython \u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002<\/strong> \u4f7f\u7528\u8ba1\u6570\u5668\u53d8\u91cf\u662f\u6700\u57fa\u7840\u548c\u7075\u6d3b\u7684\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u5404\u79cd\u5faa\u73af\u7ed3\u6784\u3002enumerate() \u51fd\u6570\u7b80\u6d01\u660e\u4e86\uff0c\u7279\u522b\u9002\u5408\u904d\u5386\u53ef\u8fed\u4ee3\u5bf9\u8c61\u3002<\/strong> \u5916\u90e8\u5e93\u5982 itertools \u548c pandas \u63d0\u4f9b\u4e86\u9ad8\u6548\u7684\u8fed\u4ee3\u5668\u548c\u6570\u636e\u5904\u7406\u5de5\u5177\uff0c\u9002\u7528\u4e8e\u7279\u5b9a\u9700\u6c42\u3002\u6b64\u5916\uff0c\u8fd8\u53ef\u4ee5\u5229\u7528 range() \u51fd\u6570\u548c\u96c6\u5408\u3001\u5b57\u5178\u7b49\u6570\u636e\u7ed3\u6784\u6765\u8ba1\u7b97\u5faa\u73af\u6b21\u6570\u3002<\/strong> \u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u6548\u7387\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5728Python\u4e2d\uff0c\u5982\u4f55\u6709\u6548\u5730\u8ddf\u8e2a\u5faa\u73af\u7684\u6267\u884c\u6b21\u6570\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u5faa\u73af\u8ba1\u6570\u5668\u6765\u8ddf\u8e2a\u5faa\u73af\u7684\u6267\u884c\u6b21\u6570\u3002\u53ef\u4ee5\u5728\u5faa\u73af\u5f00\u59cb\u4e4b\u524d\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cf\u5e76\u5c06\u5176\u521d\u59cb\u5316\u4e3a\u96f6\uff0c\u7136\u540e\u5728\u6bcf\u6b21\u8fed\u4ee3\u4e2d\u5c06\u8be5\u53d8\u91cf\u589e\u52a01\u3002\u4f8b\u5982\uff0c\u4f7f\u7528for<\/code>\u5faa\u73af\u65f6\uff0c\u53ef\u4ee5\u5728\u5faa\u73af\u4f53\u5185\u589e\u52a0\u8ba1\u6570\u5668\uff0c\u6216\u4f7f\u7528enumerate()<\/code>\u51fd\u6570\u6765\u540c\u65f6\u83b7\u53d6\u7d22\u5f15\u548c\u5143\u7d20\u3002<\/p>\n
\u6709\u6ca1\u6709\u63a8\u8350\u7684\u5de5\u5177\u6216\u5e93\u6765\u5e2e\u52a9\u8ba1\u7b97\u5faa\u73af\u6b21\u6570\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u6807\u51c6\u5e93\u5df2\u7ecf\u63d0\u4f9b\u4e86\u8db3\u591f\u7684\u5de5\u5177\u6765\u8ba1\u7b97\u5faa\u73af\u6b21\u6570\uff0c\u901a\u5e38\u60c5\u51b5\u4e0b\u4e0d\u9700\u8981\u989d\u5916\u7684\u5e93\u3002\u5982\u679c\u9700\u8981\u66f4\u590d\u6742\u7684\u6027\u80fd\u5206\u6790\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528time<\/code>\u6a21\u5757\u6765\u6d4b\u91cf\u5faa\u73af\u7684\u6267\u884c\u65f6\u95f4\uff0c\u6216\u4f7f\u7528cProfile<\/code>\u6a21\u5757\u6765\u8fdb\u884c\u66f4\u6df1\u5165\u7684\u6027\u80fd\u5206\u6790\u3002<\/p>\n
\u5982\u4f55\u5728Python\u4e2d\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u6765\u8ba1\u7b97\u5faa\u73af\u6b21\u6570\uff1f<\/strong>
\u5217\u8868\u63a8\u5bfc\u5f0f\u662f\u4e00\u79cd\u7b80\u6d01\u7684\u65b9\u5f0f\u6765\u521b\u5efa\u5217\u8868\uff0c\u540c\u65f6\u4e5f\u53ef\u4ee5\u7528\u6765\u8ba1\u7b97\u5faa\u73af\u6b21\u6570\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u901a\u8fc7\u5c06range()<\/code>\u51fd\u6570\u4e0e\u5217\u8868\u63a8\u5bfc\u5f0f\u7ed3\u5408\u4f7f\u7528\uff0c\u5feb\u901f\u751f\u6210\u4e00\u4e2a\u5305\u542b\u5faa\u73af\u6b21\u6570\u7684\u5217\u8868\u3002\u8fd9\u6837\u4e0d\u4ec5\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\uff0c\u8fd8\u6709\u6548\u51cf\u5c11\u4e86\u4ee3\u7801\u884c\u6570\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728 Python \u4e2d\u8ba1\u7b97\u5faa\u73af\u6b21\u6570\u7684\u65b9\u6cd5\u6709\u5f88\u591a\u79cd\uff0c\u5305\u62ec\u4f7f\u7528\u8ba1\u6570\u5668\u53d8\u91cf\u3001\u5185\u7f6e\u51fd\u6570 enumerate()\u3001\u4ee5\u53ca\u4f7f\u7528 […]","protected":false},"author":3,"featured_media":1161432,"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\/1161423"}],"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=1161423"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1161423\/revisions"}],"predecessor-version":[{"id":1161433,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1161423\/revisions\/1161433"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1161432"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1161423"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1161423"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1161423"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}