{"id":995993,"date":"2024-12-27T09:09:33","date_gmt":"2024-12-27T01:09:33","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/995993.html"},"modified":"2024-12-27T09:09:36","modified_gmt":"2024-12-27T01:09:36","slug":"python-%e4%b8%ad%e5%a6%82%e4%bd%95%e6%98%be%e7%a4%ba%e8%a1%8c%e6%95%b0","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/995993.html","title":{"rendered":"python \u4e2d\u5982\u4f55\u663e\u793a\u884c\u6570"},"content":{"rendered":"

\"python<\/p>\n

\u5728Python\u4e2d\u663e\u793a\u884c\u6570\u6709\u591a\u79cd\u65b9\u6cd5\uff0c\u4e3b\u8981\u5305\u62ec\u4f7f\u7528\u5185\u7f6e\u51fd\u6570\u3001\u7b2c\u4e09\u65b9\u5e93\u6216\u8005\u901a\u8fc7\u624b\u52a8\u8ba1\u6570\u3002\u5e38\u7528\u65b9\u6cd5\u6709\uff1a\u4f7f\u7528enumerate()\u51fd\u6570\u3001\u624b\u52a8\u8ba1\u6570\u3001\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\u5982pandas\u3002<\/strong>\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u51e0\u79cd\u65b9\u6cd5\u4e2d\u7684\u4e00\u79cd\uff1a<\/p>\n<\/p>\n

enumerate()\u51fd\u6570<\/strong>\uff1aPython\u5185\u7f6e\u7684enumerate()<\/code>\u51fd\u6570\u53ef\u4ee5\u7528\u4e8e\u904d\u5386\u4e00\u4e2a\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff08\u5982\u5217\u8868\u3001\u5b57\u7b26\u4e32\u7b49\uff09\u65f6\uff0c\u540c\u65f6\u83b7\u5f97\u5143\u7d20\u7684\u7d22\u5f15\u548c\u5143\u7d20\u7684\u503c\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528enumerate()<\/code>\u6765\u663e\u793a\u884c\u6570\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n

lines = [<\/p>\n
    "First line",<\/p>\n
    "Second line",<\/p>\n
    "Third line"<\/p>\n
]<\/p>\n
for index, line in enumerate(lines, start=1):<\/p>\n
    print(f"Line {index}: {line}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cenumerate()<\/code>\u51fd\u6570\u904d\u5386\u4e86lines<\/code>\u5217\u8868\uff0c\u5e76\u4ece\u7d22\u5f151\u5f00\u59cb\u4e3a\u6bcf\u4e00\u884c\u5143\u7d20\u6807\u8bb0\u884c\u6570\u3002start=1<\/code>\u53c2\u6570\u6307\u5b9a\u4ece1\u5f00\u59cb\u8ba1\u6570\uff0c\u800c\u4e0d\u662f\u4ece\u9ed8\u8ba4\u76840\u5f00\u59cb\u3002<\/p>\n<\/p>\n
\n
\u4e00\u3001\u4f7f\u7528 ENUMERATE() \u51fd\u6570<\/h3>\n<\/p>\n
enumerate()<\/code>\u51fd\u6570\u662fPython\u5185\u7f6e\u7684\u4e00\u4e2a\u529f\u80fd\u5f3a\u5927\u7684\u51fd\u6570\uff0c\u80fd\u591f\u5728\u904d\u5386\u5217\u8868\u3001\u5b57\u7b26\u4e32\u3001\u5143\u7ec4\u7b49\u53ef\u8fed\u4ee3\u5bf9\u8c61\u65f6\u63d0\u4f9b\u5143\u7d20\u7684\u7d22\u5f15\u548c\u5143\u7d20\u503c\u3002\u5b83\u662f\u4e00\u4e2a\u975e\u5e38\u9ad8\u6548\u4e14\u7b80\u5355\u7684\u65b9\u6cd5\u6765\u663e\u793a\u884c\u6570\u3002<\/p>\n<\/p>\n
1.1 \u4ec0\u4e48\u662f ENUMERATE() \u51fd\u6570<\/h4>\n<\/p>\n
enumerate()<\/code>\u662fPython\u5185\u7f6e\u51fd\u6570\u4e4b\u4e00\uff0c\u5e38\u7528\u4e8e\u904d\u5386\u5e8f\u5217\u5e76\u83b7\u53d6\u5143\u7d20\u7684\u7d22\u5f15\u548c\u503c\u3002\u5b83\u8fd4\u56de\u4e00\u4e2a\u679a\u4e3e\u5bf9\u8c61\uff0c\u901a\u5e38\u7528\u4e8efor<\/code>\u5faa\u73af\u4e2d\uff0c\u5c06\u5e8f\u5217\u4e2d\u7684\u5143\u7d20\u4e00\u4e00\u679a\u4e3e\u51fa\u6765\uff0c\u5e76\u9644\u5e26\u4e00\u4e2a\u8ba1\u6570\u5668\u3002<\/p>\n<\/p>\n
1.2 ENUMERATE() \u51fd\u6570\u7684\u7528\u6cd5<\/h4>\n<\/p>\n
\u5728\u4f7f\u7528enumerate()<\/code>\u65f6\uff0c\u53ef\u4ee5\u6307\u5b9a\u8d77\u59cb\u7d22\u5f15\uff0c\u9ed8\u8ba4\u4ece0\u5f00\u59cb\u3002\u901a\u8fc7for<\/code>\u5faa\u73af\u548cenumerate()<\/code>\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5730\u83b7\u53d6\u6bcf\u4e00\u884c\u7684\u7d22\u5f15\u548c\u5185\u5bb9\u3002<\/p>\n<\/p>\n
# \u793a\u4f8b\u4ee3\u7801<\/p>\n
lines = [<\/p>\n
    "The quick brown fox",<\/p>\n
    "jumps over the lazy dog",<\/p>\n
    "And runs away"<\/p>\n
]<\/p>\n
for index, line in enumerate(lines, start=1):<\/p>\n
    print(f"Line {index}: {line}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cenumerate()<\/code>\u51fd\u6570\u901a\u8fc7\u63d0\u4f9bstart=1<\/code>\u53c2\u6570\uff0c\u4f7f\u5f97\u7d22\u5f15\u4ece1\u5f00\u59cb\uff0c\u8fd9\u6837\u6211\u4eec\u5c31\u80fd\u591f\u4ee5\u81ea\u7136\u7684\u65b9\u5f0f\u6807\u8bb0\u884c\u6570\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u624b\u52a8\u8ba1\u6570<\/h3>\n<\/p>\n
\u6709\u65f6\uff0c\u5728\u6ca1\u6709\u4f7f\u7528\u5185\u7f6e\u51fd\u6570\u7684\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u901a\u8fc7\u624b\u52a8\u8ba1\u6570\u6765\u5b9e\u73b0\u884c\u6570\u7684\u663e\u793a\u3002\u8fd9\u79cd\u65b9\u6cd5\u867d\u7136\u4e0d\u5982enumerate()<\/code>\u7b80\u6d01\uff0c\u4f46\u5728\u67d0\u4e9b\u7279\u5b9a\u573a\u666f\u4e0b\uff0c\u5b83\u53ef\u80fd\u4f1a\u66f4\u9002\u5408\u3002<\/p>\n<\/p>\n
2.1 \u624b\u52a8\u8ba1\u6570\u7684\u57fa\u672c\u601d\u8def<\/h4>\n<\/p>\n
\u624b\u52a8\u8ba1\u6570\u7684\u6838\u5fc3\u601d\u60f3\u662f\u5728\u904d\u5386\u8fc7\u7a0b\u4e2d\u7ef4\u62a4\u4e00\u4e2a\u8ba1\u6570\u5668\u53d8\u91cf\uff0c\u6bcf\u6b21\u8fed\u4ee3\u65f6\u589e\u52a0\u8ba1\u6570\u5668\u7684\u503c\uff0c\u5e76\u5c06\u5176\u4e0e\u5f53\u524d\u884c\u5185\u5bb9\u4e00\u8d77\u6253\u5370\u3002<\/p>\n<\/p>\n
2.2 \u624b\u52a8\u8ba1\u6570\u7684\u5b9e\u73b0<\/h4>\n<\/p>\n
\u4ee5\u4e0b\u662f\u624b\u52a8\u8ba1\u6570\u7684\u5b9e\u73b0\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
# \u793a\u4f8b\u4ee3\u7801<\/p>\n
lines = [<\/p>\n
    "Line one",<\/p>\n
    "Line two",<\/p>\n
    "Line three"<\/p>\n
]<\/p>\n
line_number = 1<\/p>\n
for line in lines:<\/p>\n
    print(f"Line {line_number}: {line}")<\/p>\n
    line_number += 1<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u521d\u59cb\u5316\u4e86\u4e00\u4e2aline_number<\/code>\u53d8\u91cf\u4e3a1\uff0c\u7136\u540e\u5728\u6bcf\u6b21\u5faa\u73af\u4e2d\u8f93\u51fa\u5f53\u524d\u884c\u53f7\u548c\u884c\u5185\u5bb9\uff0c\u5e76\u5728\u5faa\u73af\u7ed3\u675f\u540e\u589e\u52a0line_number<\/code>\u7684\u503c\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528 PANDAS \u5e93<\/h3>\n<\/p>\n
\u5bf9\u4e8e\u66f4\u590d\u6742\u7684\u6570\u636e\u64cd\u4f5c\uff0c\u5c24\u5176\u662f\u5f53\u6570\u636e\u4ee5\u8868\u683c\u5f62\u5f0f\u5b58\u5728\u65f6\uff0c\u4f7f\u7528Pandas\u5e93\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u9009\u62e9\u3002Pandas\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u6570\u636e\u64cd\u4f5c\u529f\u80fd\uff0c\u5305\u62ec\u663e\u793a\u884c\u6570\u3002<\/p>\n<\/p>\n
3.1 PANDAS \u7684\u57fa\u672c\u6982\u5ff5<\/h4>\n<\/p>\n
Pandas\u662f\u4e00\u4e2a\u6d41\u884c\u7684\u6570\u636e\u5206\u6790\u5e93\uff0c\u63d0\u4f9b\u4e86\u9ad8\u6027\u80fd\u3001\u6613\u4e8e\u4f7f\u7528\u7684\u6570\u636e\u7ed3\u6784\u548c\u6570\u636e\u5206\u6790\u5de5\u5177\u3002Pandas\u7684\u6838\u5fc3\u6570\u636e\u7ed3\u6784\u662fDataFrame\u548cSeries\uff0c\u5176\u4e2dDataFrame\u662f\u4e00\u4e2a\u4e8c\u7ef4\u8868\u683c\u6570\u636e\u7ed3\u6784\u3002<\/p>\n<\/p>\n
3.2 \u4f7f\u7528 PANDAS \u663e\u793a\u884c\u6570<\/h4>\n<\/p>\n
\u4f7f\u7528Pandas\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5730\u5728DataFrame\u4e2d\u663e\u793a\u884c\u6570\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import pandas as pd<\/p>\n
\u521b\u5efa DataFrame<\/strong><\/h2>\n
data = {<\/p>\n
    'Name': ['Alice', 'Bob', 'Charlie'],<\/p>\n
    'Age': [25, 30, 35]<\/p>\n
}<\/p>\n
df = pd.DataFrame(data)<\/p>\n
\u663e\u793a\u884c\u53f7\u548c\u6570\u636e<\/strong><\/h2>\n
for i, row in df.iterrows():<\/p>\n
    print(f"Row {i + 1}: {row['Name']}, {row['Age']}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528iterrows()<\/code>\u65b9\u6cd5\u904d\u5386DataFrame\u7684\u6bcf\u4e00\u884c\uff0c\u5e76\u4f7f\u7528\u884c\u7d22\u5f15\u663e\u793a\u884c\u6570\u3002Pandas\u901a\u8fc7\u5176\u5f3a\u5927\u7684\u529f\u80fd\uff0c\u4f7f\u5f97\u6570\u636e\u64cd\u4f5c\u53d8\u5f97\u66f4\u52a0\u7b80\u5355\u548c\u9ad8\u6548\u3002<\/p>\n<\/p>\n
\u56db\u3001\u603b\u7ed3\u4e0e\u5efa\u8bae<\/h3>\n<\/p>\n
\u5728Python\u4e2d\u663e\u793a\u884c\u6570\u7684\u65b9\u6cd5\u591a\u79cd\u591a\u6837\uff0c\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u9700\u6c42\u548c\u5e94\u7528\u573a\u666f\u3002<\/p>\n<\/p>\n
4.1 \u65b9\u6cd5\u7684\u9009\u62e9<\/h4>\n<\/p>\n