{"id":1096733,"date":"2025-01-08T15:04:26","date_gmt":"2025-01-08T07:04:26","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1096733.html"},"modified":"2025-01-08T15:04:31","modified_gmt":"2025-01-08T07:04:31","slug":"python%e5%a6%82%e4%bd%95%e5%8f%96%e4%ba%8c%e7%bb%b4%e5%85%83%e7%bb%84%e6%95%b0%e6%8d%ae-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1096733.html","title":{"rendered":"Python\u5982\u4f55\u53d6\u4e8c\u7ef4\u5143\u7ec4\u6570\u636e"},"content":{"rendered":"

\"Python\u5982\u4f55\u53d6\u4e8c\u7ef4\u5143\u7ec4\u6570\u636e\"<\/p>\n

Python\u4e2d\u53d6\u4e8c\u7ef4\u5143\u7ec4\u6570\u636e\u7684\u65b9\u6cd5\u5305\u62ec\u7d22\u5f15\u3001\u5207\u7247\u3001\u8fed\u4ee3\u7b49\uff0c\u7d22\u5f15\u662f\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u3002<\/strong><\/p>\n<\/p>\n

\u5728Python\u4e2d\uff0c\u5143\u7ec4\u662f\u4e00\u79cd\u4e0d\u53ef\u53d8\u7684\u5e8f\u5217\u6570\u636e\u7c7b\u578b\uff0c\u4e8c\u7ef4\u5143\u7ec4\u5219\u662f\u5143\u7ec4\u7684\u5d4c\u5957\u5f62\u5f0f\u3002\u53d6\u4e8c\u7ef4\u5143\u7ec4\u6570\u636e\u4e3b\u8981\u4f9d\u9760\u7d22\u5f15\u548c\u5207\u7247\u64cd\u4f5c\u3002\u7d22\u5f15\u64cd\u4f5c\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9a\u884c\u548c\u5217\u7684\u65b9\u5f0f\u6765\u8bbf\u95ee\u7279\u5b9a\u5143\u7d20\u3002\u4f8b\u5982\uff0c\u5047\u8bbe\u6709\u4e00\u4e2a\u4e8c\u7ef4\u5143\u7ec4data = ((1, 2, 3), (4, 5, 6), (7, 8, 9))<\/code>\uff0c\u8981\u83b7\u53d6\u7b2c\u4e8c\u884c\u7b2c\u4e09\u5217\u7684\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528data[1][2]<\/code>\uff0c\u7ed3\u679c\u4e3a6<\/code>\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e9b\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u7d22\u5f15<\/h2>\n<\/p>\n

\u7d22\u5f15\u662f\u8bbf\u95ee\u4e8c\u7ef4\u5143\u7ec4\u6570\u636e\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u3002\u901a\u8fc7\u6307\u5b9a\u884c\u548c\u5217\u7684\u7d22\u5f15\u503c\uff0c\u53ef\u4ee5\u5feb\u901f\u83b7\u53d6\u7279\u5b9a\u5143\u7d20\u3002<\/p>\n<\/p>\n

1\u3001\u5355\u4e2a\u5143\u7d20<\/h3>\n<\/p>\n

\u5047\u8bbe\u6709\u4ee5\u4e0b\u4e8c\u7ef4\u5143\u7ec4\uff1a<\/p>\n<\/p>\n

data = ((1, 2, 3), (4, 5, 6), (7, 8, 9))<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8981\u83b7\u53d6\u7b2c\u4e8c\u884c\u7b2c\u4e09\u5217\u7684\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528\u5982\u4e0b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n
element = data[1][2]<\/p>\n
print(element)  # \u8f93\u51fa 6<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u591a\u4e2a\u5143\u7d20<\/h3>\n<\/p>\n
\u53ef\u4ee5\u901a\u8fc7\u5d4c\u5957\u5faa\u73af\u904d\u5386\u6574\u4e2a\u4e8c\u7ef4\u5143\u7ec4\uff0c\u83b7\u53d6\u6240\u6709\u5143\u7d20\uff1a<\/p>\n<\/p>\n
for row in data:<\/p>\n
    for element in row:<\/p>\n
        print(element, end=' ')<\/p>\n
    print()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u6bb5\u4ee3\u7801\u4f1a\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
1 2 3 <\/p>\n
4 5 6 <\/p>\n
7 8 9<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u5207\u7247<\/h2>\n<\/p>\n
\u5207\u7247\u64cd\u4f5c\u5141\u8bb8\u6211\u4eec\u63d0\u53d6\u4e8c\u7ef4\u5143\u7ec4\u7684\u5b50\u96c6\u3002\u4e0e\u4e00\u7ef4\u5e8f\u5217\u7c7b\u4f3c\uff0c\u5207\u7247\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9a\u8d77\u59cb\u548c\u7ed3\u675f\u7d22\u5f15\u6765\u83b7\u53d6\u7279\u5b9a\u8303\u56f4\u5185\u7684\u5143\u7d20\u3002<\/p>\n<\/p>\n
1\u3001\u884c\u5207\u7247<\/h3>\n<\/p>\n
\u83b7\u53d6\u7279\u5b9a\u884c\u7684\u5b50\u96c6\uff1a<\/p>\n<\/p>\n
rows = data[1:]<\/p>\n
print(rows)  # \u8f93\u51fa ((4, 5, 6), (7, 8, 9))<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u5217\u5207\u7247<\/h3>\n<\/p>\n
\u7531\u4e8e\u5143\u7ec4\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u6211\u4eec\u4e0d\u80fd\u76f4\u63a5\u5bf9\u5176\u8fdb\u884c\u5217\u5207\u7247\u3002\u4f46\u662f\u53ef\u4ee5\u901a\u8fc7\u5217\u8868\u63a8\u5bfc\u5f0f\u6765\u5b9e\u73b0\uff1a<\/p>\n<\/p>\n
columns = [row[1:] for row in data]<\/p>\n
print(columns)  # \u8f93\u51fa [(2, 3), (5, 6), (8, 9)]<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u8fed\u4ee3<\/h2>\n<\/p>\n
\u8fed\u4ee3\u662f\u4e00\u79cd\u8bbf\u95ee\u4e8c\u7ef4\u5143\u7ec4\u6570\u636e\u7684\u52a8\u6001\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u4e0d\u786e\u5b9a\u6570\u636e\u7ed3\u6784\u7684\u60c5\u51b5\u3002\u53ef\u4ee5\u4f7f\u7528\u5d4c\u5957\u5faa\u73af\u6765\u904d\u5386\u6240\u6709\u5143\u7d20\u3002<\/p>\n<\/p>\n
1\u3001\u5d4c\u5957\u5faa\u73af<\/h3>\n<\/p>\n
for i, row in enumerate(data):<\/p>\n
    for j, element in enumerate(row):<\/p>\n
        print(f"Element at ({i}, {j}): {element}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u6bb5\u4ee3\u7801\u4f1a\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
Element at (0, 0): 1<\/p>\n
Element at (0, 1): 2<\/p>\n
Element at (0, 2): 3<\/p>\n
Element at (1, 0): 4<\/p>\n
Element at (1, 1): 5<\/p>\n
Element at (1, 2): 6<\/p>\n
Element at (2, 0): 7<\/p>\n
Element at (2, 1): 8<\/p>\n
Element at (2, 2): 9<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u751f\u6210\u5668\u8868\u8fbe\u5f0f<\/h3>\n<\/p>\n
\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u9ad8\u6548\u7684\u8fed\u4ee3\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u5927\u578b\u6570\u636e\u96c6\uff1a<\/p>\n<\/p>\n
elements = ((i, j, data[i][j]) for i in range(len(data)) for j in range(len(data[i])))<\/p>\n
for i, j, element in elements:<\/p>\n
    print(f"Element at ({i}, {j}): {element}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u5217\u8868\u63a8\u5bfc\u5f0f\u4e0e\u6620\u5c04\u51fd\u6570<\/h2>\n<\/p>\n
\u9664\u4e86\u57fa\u672c\u7684\u7d22\u5f15\u548c\u5207\u7247\u64cd\u4f5c\uff0c\u5217\u8868\u63a8\u5bfc\u5f0f\u548c\u6620\u5c04\u51fd\u6570\u4e5f\u662f\u53d6\u4e8c\u7ef4\u5143\u7ec4\u6570\u636e\u7684\u6709\u6548\u65b9\u6cd5\u3002<\/p>\n<\/p>\n
1\u3001\u5217\u8868\u63a8\u5bfc\u5f0f<\/h3>\n<\/p>\n
\u901a\u8fc7\u5217\u8868\u63a8\u5bfc\u5f0f\uff0c\u53ef\u4ee5\u5feb\u901f\u6784\u5efa\u4e8c\u7ef4\u5143\u7ec4\u7684\u5b50\u96c6\uff1a<\/p>\n<\/p>\n
subset = [(x, y) for x in range(len(data)) for y in range(len(data[x])) if data[x][y] % 2 == 0]<\/p>\n
print(subset)  # \u8f93\u51fa [(0, 1), (1, 0), (1, 2), (2, 1)]<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u6620\u5c04\u51fd\u6570<\/h3>\n<\/p>\n
\u53ef\u4ee5\u4f7f\u7528map<\/code>\u51fd\u6570\u5bf9\u4e8c\u7ef4\u5143\u7ec4\u8fdb\u884c\u53d8\u6362\uff1a<\/p>\n<\/p>\n
transformed = tuple(map(lambda row: tuple(map(lambda x: x * 2, row)), data))<\/p>\n
print(transformed)  # \u8f93\u51fa ((2, 4, 6), (8, 10, 12), (14, 16, 18))<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e94\u3001\u5176\u4ed6\u9ad8\u7ea7\u65b9\u6cd5<\/h2>\n<\/p>\n
\u9664\u4e86\u4ee5\u4e0a\u57fa\u672c\u64cd\u4f5c\uff0c\u8fd8\u53ef\u4ee5\u5229\u7528\u4e00\u4e9bPython\u9ad8\u7ea7\u7279\u6027\u6765\u64cd\u4f5c\u4e8c\u7ef4\u5143\u7ec4\u6570\u636e\u3002<\/p>\n<\/p>\n
1\u3001\u89e3\u5305<\/h3>\n<\/p>\n
\u89e3\u5305\u64cd\u4f5c\u53ef\u4ee5\u5c06\u4e8c\u7ef4\u5143\u7ec4\u7684\u5143\u7d20\u5206\u914d\u7ed9\u591a\u4e2a\u53d8\u91cf\uff1a<\/p>\n<\/p>\n
(row1, row2, row3) = data<\/p>\n
print(row1, row2, row3)  # \u8f93\u51fa (1, 2, 3) (4, 5, 6) (7, 8, 9)<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001NumPy\u5e93<\/h3>\n<\/p>\n
NumPy\u662fPython\u7684\u4e00\u4e2a\u5f3a\u5927\u5e93\uff0c\u4e13\u95e8\u7528\u4e8e\u6570\u503c\u8ba1\u7b97\u3002\u5b83\u63d0\u4f9b\u4e86\u5bf9\u591a\u7ef4\u6570\u7ec4\u7684\u9ad8\u6548\u64cd\u4f5c\u3002<\/p>\n<\/p>\n
import numpy as np<\/p>\n
array = np.array(data)<\/p>\n
print(array)  # \u8f93\u51fa [[1 2 3] [4 5 6] [7 8 9]]<\/p>\n
\u83b7\u53d6\u7b2c\u4e8c\u884c\u7b2c\u4e09\u5217\u7684\u5143\u7d20<\/strong><\/h2>\n
element = array[1, 2]<\/p>\n
print(element)  # \u8f93\u51fa 6<\/p>\n
<\/code><\/pre>\n<\/p>\n
3\u3001Pandas\u5e93<\/h3>\n<\/p>\n
Pandas\u662f\u53e6\u4e00\u4e2a\u5f3a\u5927\u7684\u6570\u636e\u5904\u7406\u5e93\uff0c\u9002\u7528\u4e8e\u6570\u636e\u5206\u6790\u4efb\u52a1\u3002\u5b83\u53ef\u4ee5\u5c06\u4e8c\u7ef4\u5143\u7ec4\u8f6c\u6362\u4e3aDataFrame\uff0c\u65b9\u4fbf\u540e\u7eed\u64cd\u4f5c\u3002<\/p>\n<\/p>\n
import pandas as pd<\/p>\n
df = pd.DataFrame(data)<\/p>\n
print(df)<\/p>\n
\u83b7\u53d6\u7b2c\u4e8c\u884c\u7b2c\u4e09\u5217\u7684\u5143\u7d20<\/strong><\/h2>\n
element = df.iloc[1, 2]<\/p>\n
print(element)  # \u8f93\u51fa 6<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u603b\u7ed3<\/h2>\n<\/p>\n
\u5728Python\u4e2d\uff0c\u53d6\u4e8c\u7ef4\u5143\u7ec4\u6570\u636e\u7684\u65b9\u6cd5\u4e30\u5bcc\u591a\u6837\uff0c\u4e3b\u8981\u5305\u62ec\u7d22\u5f15\u3001\u5207\u7247\u3001\u8fed\u4ee3\u3001\u5217\u8868\u63a8\u5bfc\u5f0f\u3001\u6620\u5c04\u51fd\u6570\u3001\u89e3\u5305\u7b49\u3002\u5bf9\u4e8e\u5927\u578b\u6570\u636e\u96c6\uff0c\u53ef\u4ee5\u501f\u52a9NumPy\u548cPandas\u5e93\u8fdb\u884c\u9ad8\u6548\u64cd\u4f5c\u3002\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u5e94\u7528\u573a\u666f\u548c\u6570\u636e\u89c4\u6a21\u3002\u901a\u8fc7\u719f\u7ec3\u638c\u63e1\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5728\u5b9e\u9645\u7f16\u7a0b\u4e2d\u7075\u6d3b\u5904\u7406\u5404\u79cd\u4e8c\u7ef4\u5143\u7ec4\u6570\u636e\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u5728Python\u4e2d\u8bbf\u95ee\u4e8c\u7ef4\u5143\u7ec4\u7684\u7279\u5b9a\u5143\u7d20\uff1f<\/strong>
\u8981\u8bbf\u95ee\u4e8c\u7ef4\u5143\u7ec4\u4e2d\u7684\u7279\u5b9a\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528\u7d22\u5f15\u6765\u6307\u5b9a\u884c\u548c\u5217\u3002\u4e8c\u7ef4\u5143\u7ec4\u7684\u7ed3\u6784\u7c7b\u4f3c\u4e8e\u5217\u8868\uff0c\u4f46\u5176\u5143\u7d20\u4e0d\u53ef\u4fee\u6539\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6709\u4e00\u4e2a\u4e8c\u7ef4\u5143\u7ec4data = ((1, 2), (3, 4), (5, 6))<\/code>\uff0c\u8981\u8bbf\u95ee\u7b2c\u4e00\u884c\u7b2c\u4e8c\u5217\u7684\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528data[0][1]<\/code>\uff0c\u7ed3\u679c\u4e3a2<\/code>\u3002<\/p>\n
\u5728Python\u4e2d\uff0c\u4e8c\u7ef4\u5143\u7ec4\u7684\u4f7f\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f<\/strong>
\u4e8c\u7ef4\u5143\u7ec4\u5e38\u7528\u4e8e\u9700\u8981\u5b58\u50a8\u548c\u5904\u7406\u8868\u683c\u6570\u636e\u7684\u573a\u666f\uff0c\u5982\u5750\u6807\u70b9\u3001\u68cb\u76d8\u6e38\u620f\u72b6\u6001\u6216\u77e9\u9635\u8fd0\u7b97\u7b49\u3002\u56e0\u4e3a\u5143\u7ec4\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u6240\u4ee5\u5b83\u4eec\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u6bd4\u5217\u8868\u66f4\u5b89\u5168\uff0c\u907f\u514d\u4e86\u610f\u5916\u4fee\u6539\u6570\u636e\u7684\u98ce\u9669\u3002\u8fd9\u4f7f\u5f97\u4e8c\u7ef4\u5143\u7ec4\u5728\u9700\u8981\u4fdd\u8bc1\u6570\u636e\u5b8c\u6574\u6027\u7684\u573a\u5408\u5c24\u4e3a\u91cd\u8981\u3002<\/p>\n
\u5982\u4f55\u5c06\u4e8c\u7ef4\u5143\u7ec4\u8f6c\u6362\u4e3a\u5176\u4ed6\u6570\u636e\u7ed3\u6784\uff1f<\/strong>
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