{"id":925910,"date":"2024-12-26T15:40:35","date_gmt":"2024-12-26T07:40:35","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/925910.html"},"modified":"2024-12-26T15:40:38","modified_gmt":"2024-12-26T07:40:38","slug":"python%e5%a6%82%e4%bd%95%e5%8a%a0%e8%a1%8c","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/925910.html","title":{"rendered":"python\u5982\u4f55\u52a0\u884c"},"content":{"rendered":"

\"python\u5982\u4f55\u52a0\u884c\"<\/p>\n

\u5728Python\u4e2d\u6dfb\u52a0\u884c\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u5b9e\u73b0\uff0c\u5982\u4f7f\u7528\u5b57\u7b26\u4e32\u64cd\u4f5c\u3001\u5217\u8868\u3001\u6587\u4ef6\u8bfb\u5199\u7b49\u3002\u6700\u5e38\u89c1\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u4f7f\u7528\u5b57\u7b26\u4e32\u7684\u6362\u884c\u7b26'\\n'\u3001\u5728\u5217\u8868\u4e2d\u4f7f\u7528append()\u65b9\u6cd5\u6dfb\u52a0\u5143\u7d20\u3001\u901a\u8fc7\u6587\u4ef6\u64cd\u4f5c\u589e\u52a0\u65b0\u884c\u3002\u4ee5\u4e0b\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5176\u4e2d\u4e00\u79cd\u65b9\u6cd5\uff1a\u5728\u5904\u7406\u6587\u4ef6\u65f6\uff0c\u901a\u8fc7\u6253\u5f00\u6587\u4ef6\u5e76\u4f7f\u7528write()\u65b9\u6cd5\u6765\u6dfb\u52a0\u65b0\u884c\u662f\u975e\u5e38\u5e38\u7528\u7684\u65b9\u5f0f\u3002<\/strong><\/p>\n<\/p>\n

\u4e00\u3001\u5b57\u7b26\u4e32\u64cd\u4f5c\u4e2d\u7684\u6362\u884c\u7b26<\/p>\n<\/p>\n

\u5728Python\u4e2d\uff0c\u5b57\u7b26\u4e32\u672c\u8eab\u53ef\u4ee5\u5305\u542b\u6362\u884c\u7b26\uff0c\u4ee5\u4fbf\u5728\u6587\u672c\u4e2d\u6dfb\u52a0\u884c\u3002\u5728\u5b57\u7b26\u4e32\u4e2d\u4f7f\u7528\\n<\/code>\uff08\u6362\u884c\u7b26\uff09\u53ef\u4ee5\u76f4\u63a5\u5728\u5b57\u7b26\u4e32\u4e2d\u63d2\u5165\u4e00\u4e2a\u65b0\u884c\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n

text = "Hello, World!\\nWelcome to Python programming."<\/p>\n
print(text)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u6bb5\u4ee3\u7801\u5c06\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
Hello, World!<\/p>\n
Welcome to Python programming.<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u5728\u5b9a\u4e49\u5b57\u7b26\u4e32\u65f6\u76f4\u63a5\u63d2\u5165\u65b0\u884c\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528\u5217\u8868\u589e\u52a0\u884c<\/p>\n<\/p>\n
Python\u7684\u5217\u8868\u662f\u4e00\u4e2a\u975e\u5e38\u7075\u6d3b\u7684\u6570\u636e\u7ed3\u6784\uff0c\u60a8\u53ef\u4ee5\u8f7b\u677e\u5730\u5728\u5217\u8868\u4e2d\u6dfb\u52a0\u65b0\u5143\u7d20\u3002\u4f7f\u7528append()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u5728\u5217\u8868\u672b\u5c3e\u6dfb\u52a0\u65b0\u7684\u884c\u3002<\/p>\n<\/p>\n
lines = ["First line", "Second line"]<\/p>\n
lines.append("Third line")<\/p>\n
print(lines)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u5c06\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
['First line', 'Second line', 'Third line']<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5217\u8868\u5728\u9700\u8981\u52a8\u6001\u589e\u52a0\u884c\u65f6\u975e\u5e38\u6709\u7528\uff0c\u5c24\u5176\u662f\u5728\u9010\u884c\u5904\u7406\u6570\u636e\u65f6\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u6587\u4ef6\u64cd\u4f5c\u4e2d\u6dfb\u52a0\u65b0\u884c<\/p>\n<\/p>\n
\u5728\u5904\u7406\u6587\u672c\u6587\u4ef6\u65f6\uff0c\u901a\u5e38\u9700\u8981\u5728\u6587\u4ef6\u4e2d\u6dfb\u52a0\u65b0\u884c\u3002\u53ef\u4ee5\u4f7f\u7528Python\u7684\u5185\u7f6eopen()<\/code>\u51fd\u6570\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5728\u6587\u4ef6\u672b\u5c3e\u6dfb\u52a0\u65b0\u884c\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
with open('example.txt', 'a') as file:<\/p>\n
    file.write('\\nThis is a new line.')<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0copen()<\/code>\u51fd\u6570\u4ee5\u8ffd\u52a0\u6a21\u5f0f'a'<\/code>\u6253\u5f00\u6587\u4ef6example.txt<\/code>\uff0c\u7136\u540e\u4f7f\u7528write()<\/code>\u65b9\u6cd5\u5728\u6587\u4ef6\u672b\u5c3e\u5199\u5165\u4e00\u4e2a\u65b0\u884c\u3002\u8fd9\u79cd\u65b9\u6cd5\u5728\u9700\u8981\u5728\u73b0\u6709\u6587\u4ef6\u4e2d\u6dfb\u52a0\u6570\u636e\u65f6\u975e\u5e38\u6709\u6548\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528join()<\/code>\u65b9\u6cd5\u7ec4\u5408\u5b57\u7b26\u4e32<\/p>\n<\/p>\n
\u5728\u9700\u8981\u5c06\u591a\u884c\u6587\u672c\u5408\u5e76\u4e3a\u4e00\u4e2a\u6574\u4f53\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b57\u7b26\u4e32\u7684join()<\/code>\u65b9\u6cd5\u3002\u6b64\u65b9\u6cd5\u7279\u522b\u9002\u5408\u5c06\u5217\u8868\u4e2d\u7684\u5b57\u7b26\u4e32\u5143\u7d20\u7ec4\u5408\u6210\u4e00\u4e2a\u5b8c\u6574\u7684\u5b57\u7b26\u4e32\uff0c\u5e76\u5728\u6bcf\u4e2a\u5143\u7d20\u4e4b\u95f4\u63d2\u5165\u6362\u884c\u7b26\u3002<\/p>\n<\/p>\n
lines = ["Line 1", "Line 2", "Line 3"]<\/p>\n
text = '\\n'.join(lines)<\/p>\n
print(text)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
Line 1<\/p>\n
Line 2<\/p>\n
Line 3<\/p>\n
<\/code><\/pre>\n<\/p>\n
join()<\/code>\u65b9\u6cd5\u4e3a\u5c06\u591a\u4e2a\u5b57\u7b26\u4e32\u5143\u7d20\u7ed3\u5408\u5728\u4e00\u8d77\u63d0\u4f9b\u4e86\u4e00\u79cd\u9ad8\u6548\u7684\u65b9\u6cd5\uff0c\u540c\u65f6\u5141\u8bb8\u60a8\u6307\u5b9a\u5143\u7d20\u4e4b\u95f4\u7684\u5206\u9694\u7b26\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u4f7f\u7528readlines()<\/code>\u548cwritelines()<\/code>\u65b9\u6cd5<\/p>\n<\/p>\n
\u5728\u5904\u7406\u6587\u4ef6\u65f6\uff0creadlines()<\/code>\u548cwritelines()<\/code>\u65b9\u6cd5\u63d0\u4f9b\u4e86\u4e00\u79cd\u65b9\u4fbf\u7684\u65b9\u5f0f\u6765\u8bfb\u53d6\u548c\u5199\u5165\u591a\u884c\u6587\u672c\u3002\u8fd9\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u7528\u4e8e\u5c06\u6587\u4ef6\u5185\u5bb9\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\u8fdb\u884c\u5904\u7406\uff0c\u7136\u540e\u5c06\u4fee\u6539\u540e\u7684\u5185\u5bb9\u5199\u56de\u6587\u4ef6\u3002<\/p>\n<\/p>\n
# \u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9<\/p>\n
with open('example.txt', 'r') as file:<\/p>\n
    lines = file.readlines()<\/p>\n
\u5728\u672b\u5c3e\u6dfb\u52a0\u65b0\u884c<\/strong><\/h2>\n
lines.append('This is an added line.\\n')<\/p>\n
\u5199\u56de\u6587\u4ef6<\/strong><\/h2>\n
with open('example.txt', 'w') as file:<\/p>\n
    file.writelines(lines)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u975e\u5e38\u9002\u5408\u5728\u9700\u8981\u5bf9\u6587\u4ef6\u5185\u5bb9\u8fdb\u884c\u590d\u6742\u64cd\u4f5c\u65f6\u4f7f\u7528\uff0c\u4f8b\u5982\u5728\u7279\u5b9a\u4f4d\u7f6e\u63d2\u5165\u6216\u5220\u9664\u884c\u3002<\/p>\n<\/p>\n
\u516d\u3001\u4f7f\u7528csv<\/code>\u6a21\u5757\u5904\u7406CSV\u6587\u4ef6<\/p>\n<\/p>\n
\u5bf9\u4e8eCSV\u6587\u4ef6\uff0cPython\u7684csv<\/code>\u6a21\u5757\u63d0\u4f9b\u4e86\u4e00\u79cd\u9ad8\u6548\u7684\u65b9\u6cd5\u6765\u5904\u7406\u884c\u6570\u636e\u3002\u4f7f\u7528csv.writer()<\/code>\u53ef\u4ee5\u8f7b\u677e\u5730\u5728CSV\u6587\u4ef6\u4e2d\u6dfb\u52a0\u65b0\u884c\u3002<\/p>\n<\/p>\n
import csv<\/p>\n
with open('data.csv', 'a', newline='') as csvfile:<\/p>\n
    writer = csv.writer(csvfile)<\/p>\n
    writer.writerow(['New', 'Row', 'Data'])<\/p>\n
<\/code><\/pre>\n<\/p>\n
csv<\/code>\u6a21\u5757\u4e3a\u5904\u7406CSV\u683c\u5f0f\u7684\u6570\u636e\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u529f\u80fd\uff0c\u5e76\u7b80\u5316\u4e86\u884c\u7684\u8ffd\u52a0\u548c\u4fee\u6539\u3002<\/p>\n<\/p>\n
\u4e03\u3001\u4f7f\u7528pandas<\/code>\u5e93\u5904\u7406\u6570\u636e<\/p>\n<\/p>\n
pandas<\/code>\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u6570\u636e\u5206\u6790\u5e93\uff0c\u63d0\u4f9b\u4e86DataFrame\u7ed3\u6784\u6765\u5b58\u50a8\u548c\u64cd\u4f5c\u6570\u636e\u3002\u5728DataFrame\u4e2d\u53ef\u4ee5\u901a\u8fc7append()<\/code>\u65b9\u6cd5\u6765\u6dfb\u52a0\u65b0\u884c\u3002<\/p>\n<\/p>\n
import pandas as pd<\/p>\n
df = pd.DataFrame({'Column1': [1, 2], 'Column2': [3, 4]})<\/p>\n
new_row = pd.DataFrame({'Column1': [5], 'Column2': [6]})<\/p>\n
df = df.append(new_row, ignore_index=True)<\/p>\n
print(df)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u5c06\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
   Column1  Column2<\/p>\n
0        1        3<\/p>\n
1        2        4<\/p>\n
2        5        6<\/p>\n
<\/code><\/pre>\n<\/p>\n
pandas<\/code>\u5e93\u63d0\u4f9b\u4e86\u8bb8\u591a\u529f\u80fd\u5f3a\u5927\u7684\u65b9\u6cd5\u6765\u64cd\u4f5c\u548c\u5206\u6790\u6570\u636e\uff0c\u975e\u5e38\u9002\u5408\u5904\u7406\u5927\u578b\u6570\u636e\u96c6\u3002<\/p>\n<\/p>\n
\u516b\u3001\u4f7f\u7528numpy<\/code>\u5e93\u5904\u7406\u6570\u7ec4<\/p>\n<\/p>\n
\u5bf9\u4e8e\u6570\u503c\u6570\u636e\uff0cnumpy<\/code>\u5e93\u63d0\u4f9b\u4e86\u9ad8\u6548\u7684\u6570\u7ec4\u64cd\u4f5c\u529f\u80fd\u3002\u53ef\u4ee5\u4f7f\u7528numpy.vstack()<\/code>\u51fd\u6570\u5728\u6570\u7ec4\u4e2d\u6dfb\u52a0\u65b0\u884c\u3002<\/p>\n<\/p>\n
import numpy as np<\/p>\n
array = np.array([[1, 2], [3, 4]])<\/p>\n
new_row = np.array([[5, 6]])<\/p>\n
array = np.vstack((array, new_row))<\/p>\n
print(array)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<\/p>\n
[[1 2]<\/p>\n
 [3 4]<\/p>\n
 [5 6]]<\/p>\n
<\/code><\/pre>\n<\/p>\n
numpy<\/code>\u5e93\u4e3a\u6570\u503c\u8ba1\u7b97\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u9002\u5408\u9700\u8981\u6267\u884c\u9ad8\u6548\u6570\u7ec4\u64cd\u4f5c\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u4e5d\u3001\u603b\u7ed3<\/p>\n<\/p>\n
\u5728Python\u4e2d\u6dfb\u52a0\u884c\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u4f9b\u9009\u62e9\uff0c\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u7279\u5b9a\u7684\u5e94\u7528\u573a\u666f\u3002\u5728\u5904\u7406\u6587\u672c\u65f6\uff0c\u5b57\u7b26\u4e32\u64cd\u4f5c\u548c\u6587\u4ef6\u8bfb\u5199\u662f\u5e38\u7528\u7684\u65b9\u6cd5\uff1b\u5728\u5904\u7406\u7ed3\u6784\u5316\u6570\u636e\u65f6\uff0ccsv<\/code>\u3001pandas<\/code>\u548cnumpy<\/code>\u7b49\u5e93\u63d0\u4f9b\u4e86\u66f4\u5f3a\u5927\u7684\u529f\u80fd\u3002\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u4ee3\u7801\u7684\u6548\u7387\u548c\u53ef\u8bfb\u6027\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5728Python\u4e2d\uff0c\u5982\u4f55\u5728\u6587\u672c\u6587\u4ef6\u4e2d\u6dfb\u52a0\u65b0\u884c\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528open()<\/code>\u51fd\u6570\u4ee5\u8ffd\u52a0\u6a21\u5f0f\uff08'a'\uff09\u6253\u5f00\u6587\u4ef6\uff0c\u7136\u540e\u4f7f\u7528write()<\/code>\u65b9\u6cd5\u6dfb\u52a0\u65b0\u884c\u3002\u8981\u786e\u4fdd\u5728\u65b0\u884c\u4e4b\u524d\u6dfb\u52a0\u6362\u884c\u7b26\uff0c\u53ef\u4ee5\u5728\u5199\u5165\u6587\u672c\u65f6\u5728\u5b57\u7b26\u4e32\u524d\u52a0\u4e0a\\n<\/code>\u3002\u793a\u4f8b\u5982\u4e0b\uff1a  <\/p>\n
with open('\u6587\u4ef6\u540d.txt', 'a') as file:\n    file.write('\\n\u8fd9\u662f\u65b0\u6dfb\u52a0\u7684\u4e00\u884c\u3002')\n<\/code><\/pre>\n
\u8fd9\u6837\uff0c\u65b0\u884c\u5c06\u88ab\u6210\u529f\u6dfb\u52a0\u5230\u6587\u4ef6\u672b\u5c3e\u3002<\/p>\n
\u5728Python\u5217\u8868\u4e2d\u5982\u4f55\u63d2\u5165\u65b0\u884c\u6216\u65b0\u5143\u7d20\uff1f<\/strong>
\u82e5\u60f3\u5728Python\u7684\u5217\u8868\u4e2d\u63d2\u5165\u65b0\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528insert()<\/code>\u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u5141\u8bb8\u5728\u6307\u5b9a\u4f4d\u7f6e\u63d2\u5165\u65b0\u5143\u7d20\u3002\u4f8b\u5982\uff0c\u4f7f\u7528my_list.insert(2, '\u65b0\u5143\u7d20')<\/code>\u53ef\u4ee5\u5728\u7d22\u5f152\u7684\u4f4d\u7f6e\u63d2\u5165\u65b0\u5143\u7d20\u3002\u8fd9\u6837\uff0c\u539f\u6709\u5143\u7d20\u4f1a\u76f8\u5e94\u5730\u5411\u540e\u79fb\u52a8\u3002<\/p>\n
\u5982\u4f55\u4f7f\u7528Python\u5728\u5b57\u7b26\u4e32\u4e2d\u6dfb\u52a0\u6362\u884c\u7b26\uff1f<\/strong>
\u5728\u5904\u7406\u5b57\u7b26\u4e32\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7\u5728\u5b57\u7b26\u4e32\u4e2d\u4f7f\u7528\\n<\/code>\u6765\u6dfb\u52a0\u6362\u884c\u7b26\u3002\u4f8b\u5982\uff1a  <\/p>\n
text = "\u7b2c\u4e00\u884c\\n\u7b2c\u4e8c\u884c\\n\u7b2c\u4e09\u884c"\nprint(text)\n<\/code><\/pre>\n
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