{"id":932830,"date":"2024-12-26T18:05:37","date_gmt":"2024-12-26T10:05:37","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/932830.html"},"modified":"2024-12-26T18:05:38","modified_gmt":"2024-12-26T10:05:38","slug":"python%e5%a6%82%e4%bd%95%e7%94%a8os","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/932830.html","title":{"rendered":"python\u5982\u4f55\u7528os"},"content":{"rendered":"

\"python\u5982\u4f55\u7528os\"<\/p>\n

\u5728Python\u4e2d\uff0c\u4f7f\u7528os\u6a21\u5757\u53ef\u4ee5\u65b9\u4fbf\u5730\u8fdb\u884c\u64cd\u4f5c\u7cfb\u7edf\u76f8\u5173\u7684\u4efb\u52a1\uff0c\u5982\u6587\u4ef6\u548c\u76ee\u5f55\u7684\u7ba1\u7406\u3001\u6267\u884c\u7cfb\u7edf\u547d\u4ee4\u3001\u83b7\u53d6\u73af\u5883\u53d8\u91cf\u7b49\u3002os\u6a21\u5757\u63d0\u4f9b\u4e86\u8de8\u5e73\u53f0\u7684\u65b9\u6cd5\u6765\u4e0e\u64cd\u4f5c\u7cfb\u7edf\u8fdb\u884c\u4ea4\u4e92\u3001os\u6a21\u5757\u7684\u4f7f\u7528\u975e\u5e38\u7b80\u5355\u4e14\u529f\u80fd\u4e30\u5bcc\uff0cos\u6a21\u5757\u662fPython\u6807\u51c6\u5e93\u7684\u4e00\u90e8\u5206\uff0c\u901a\u5e38\u4e0d\u9700\u8981\u989d\u5916\u5b89\u88c5\u3002<\/strong><\/p>\n<\/p>\n

os\u6a21\u5757\u662fPython\u7684\u6807\u51c6\u5e93\u4e4b\u4e00\uff0c\u63d0\u4f9b\u4e86\u8bb8\u591a\u4e0e\u64cd\u4f5c\u7cfb\u7edf\u4ea4\u4e92\u7684\u51fd\u6570\u548c\u65b9\u6cd5\u3002\u901a\u8fc7os\u6a21\u5757\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u5b9e\u73b0\u5bf9\u6587\u4ef6\u548c\u76ee\u5f55\u7684\u64cd\u4f5c\u3001\u83b7\u53d6\u7cfb\u7edf\u73af\u5883\u53d8\u91cf\u3001\u6267\u884c\u7cfb\u7edf\u547d\u4ee4\u7b49\u529f\u80fd\u3002\u5728\u8bb8\u591a\u60c5\u51b5\u4e0b\uff0cos\u6a21\u5757\u662f\u8fdb\u884c\u7cfb\u7edf\u7f16\u7a0b\u548c\u811a\u672c\u7f16\u5199\u7684\u57fa\u7840\u5de5\u5177\u3002<\/p>\n<\/p>\n

\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u4ecb\u7ecdos\u6a21\u5757\u7684\u4e3b\u8981\u529f\u80fd\u548c\u7528\u6cd5\uff0c\u5e76\u901a\u8fc7\u5177\u4f53\u793a\u4f8b\u5c55\u793a\u5982\u4f55\u5728Python\u4e2d\u5229\u7528os\u6a21\u5757\u5b8c\u6210\u5e38\u89c1\u7684\u64cd\u4f5c\u7cfb\u7edf\u4efb\u52a1\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u6587\u4ef6\u548c\u76ee\u5f55\u64cd\u4f5c<\/h3>\n<\/p>\n

os\u6a21\u5757\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u51fd\u6570\uff0c\u7528\u4e8e\u5bf9\u6587\u4ef6\u548c\u76ee\u5f55\u8fdb\u884c\u64cd\u4f5c\u3002\u8fd9\u4e9b\u51fd\u6570\u4f7f\u5f97\u5728Python\u4e2d\u8fdb\u884c\u6587\u4ef6\u7ba1\u7406\u53d8\u5f97\u7b80\u5355\u800c\u9ad8\u6548\u3002<\/p>\n<\/p>\n

1. \u83b7\u53d6\u5f53\u524d\u5de5\u4f5c\u76ee\u5f55<\/h4>\n<\/p>\n

\u8981\u83b7\u53d6\u5f53\u524d\u5de5\u4f5c\u76ee\u5f55\uff0c\u53ef\u4ee5\u4f7f\u7528os.getcwd()<\/code>\u51fd\u6570\u3002\u8be5\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u8868\u793a\u5f53\u524d\u7684\u5de5\u4f5c\u76ee\u5f55\u8def\u5f84\u3002<\/p>\n<\/p>\n

import os<\/p>\n
current_directory = os.getcwd()<\/p>\n
print(f"\u5f53\u524d\u5de5\u4f5c\u76ee\u5f55\u662f\uff1a{current_directory}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u6539\u53d8\u5de5\u4f5c\u76ee\u5f55<\/h4>\n<\/p>\n
\u4f7f\u7528os.chdir(path)<\/code>\u53ef\u4ee5\u6539\u53d8\u5f53\u524d\u7684\u5de5\u4f5c\u76ee\u5f55\uff0c\u5176\u4e2dpath<\/code>\u662f\u76ee\u6807\u76ee\u5f55\u7684\u8def\u5f84\u3002<\/p>\n<\/p>\n
os.chdir('\/path\/to\/new\/directory')<\/p>\n
print(f"\u5de5\u4f5c\u76ee\u5f55\u5df2\u66f4\u6539\u4e3a\uff1a{os.getcwd()}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
3. \u521b\u5efa\u76ee\u5f55<\/h4>\n<\/p>\n
\u8981\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u76ee\u5f55\uff0c\u53ef\u4ee5\u4f7f\u7528os.mkdir(path)<\/code>\u51fd\u6570\u3002\u82e5\u8981\u521b\u5efa\u591a\u7ea7\u76ee\u5f55\uff0c\u53ef\u4ee5\u4f7f\u7528os.makedirs(path)<\/code>\u3002<\/p>\n<\/p>\n
# \u521b\u5efa\u5355\u4e2a\u76ee\u5f55<\/p>\n
os.mkdir('new_folder')<\/p>\n
\u521b\u5efa\u591a\u7ea7\u76ee\u5f55<\/strong><\/h2>\n
os.makedirs('parent_folder\/child_folder')<\/p>\n
<\/code><\/pre>\n<\/p>\n
4. \u5220\u9664\u76ee\u5f55<\/h4>\n<\/p>\n
\u5220\u9664\u76ee\u5f55\u53ef\u4ee5\u4f7f\u7528os.rmdir(path)<\/code>\u3002\u6ce8\u610f\uff0c\u8be5\u51fd\u6570\u53ea\u80fd\u5220\u9664\u7a7a\u76ee\u5f55\u3002\u82e5\u8981\u9012\u5f52\u5220\u9664\u76ee\u5f55\u53ca\u5176\u5185\u5bb9\uff0c\u53ef\u4ee5\u4f7f\u7528shutil.rmtree(path)<\/code>\uff0c\u4f46shutil<\/code>\u6a21\u5757\u9700\u5355\u72ec\u5bfc\u5165\u3002<\/p>\n<\/p>\n
import shutil<\/p>\n
\u5220\u9664\u5355\u4e2a\u7a7a\u76ee\u5f55<\/strong><\/h2>\n
os.rmdir('new_folder')<\/p>\n
\u9012\u5f52\u5220\u9664\u76ee\u5f55\u53ca\u5176\u5185\u5bb9<\/strong><\/h2>\n
shutil.rmtree('parent_folder')<\/p>\n
<\/code><\/pre>\n<\/p>\n
5. \u5217\u51fa\u76ee\u5f55\u5185\u5bb9<\/h4>\n<\/p>\n
\u4f7f\u7528os.listdir(path)<\/code>\u53ef\u4ee5\u5217\u51fa\u6307\u5b9a\u76ee\u5f55\u4e2d\u7684\u6240\u6709\u6587\u4ef6\u548c\u5b50\u76ee\u5f55\u3002<\/p>\n<\/p>\n
contents = os.listdir('.')<\/p>\n
print(f"\u5f53\u524d\u76ee\u5f55\u4e2d\u7684\u5185\u5bb9\u6709\uff1a{contents}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u6587\u4ef6\u64cd\u4f5c<\/h3>\n<\/p>\n
os\u6a21\u5757\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e9b\u7528\u4e8e\u6587\u4ef6\u64cd\u4f5c\u7684\u51fd\u6570\uff0c\u5982\u91cd\u547d\u540d\u3001\u5220\u9664\u6587\u4ef6\u7b49\u3002<\/p>\n<\/p>\n
1. \u91cd\u547d\u540d\u6587\u4ef6<\/h4>\n<\/p>\n
\u4f7f\u7528os.rename(src, dst)<\/code>\u53ef\u4ee5\u91cd\u547d\u540d\u6587\u4ef6\u6216\u5c06\u5176\u79fb\u52a8\u5230\u65b0\u7684\u4f4d\u7f6e\u3002<\/p>\n<\/p>\n
# \u91cd\u547d\u540d\u6587\u4ef6<\/p>\n
os.rename('old_name.txt', 'new_name.txt')<\/p>\n
\u79fb\u52a8\u6587\u4ef6<\/strong><\/h2>\n
os.rename('new_name.txt', '\/path\/to\/new\/directory\/new_name.txt')<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u5220\u9664\u6587\u4ef6<\/h4>\n<\/p>\n
\u4f7f\u7528os.remove(path)<\/code>\u53ef\u4ee5\u5220\u9664\u6587\u4ef6\u3002<\/p>\n<\/p>\n
os.remove('unnecessary_file.txt')<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u6267\u884c\u7cfb\u7edf\u547d\u4ee4<\/h3>\n<\/p>\n
os\u6a21\u5757\u5141\u8bb8\u5728Python\u7a0b\u5e8f\u4e2d\u6267\u884c\u7cfb\u7edf\u547d\u4ee4\uff0c\u8fd9\u5bf9\u4e8e\u81ea\u52a8\u5316\u811a\u672c\u548c\u7cfb\u7edf\u7ba1\u7406\u4efb\u52a1\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n
1. \u6267\u884c\u7b80\u5355\u547d\u4ee4<\/h4>\n<\/p>\n
\u4f7f\u7528os.system(command)<\/code>\u53ef\u4ee5\u6267\u884c\u7cfb\u7edf\u547d\u4ee4\u3002\u8be5\u51fd\u6570\u5728\u6267\u884c\u5b8c\u6210\u540e\u8fd4\u56de\u547d\u4ee4\u7684\u9000\u51fa\u72b6\u6001\u3002<\/p>\n<\/p>\n
exit_status = os.system('echo Hello, World!')<\/p>\n
print(f"\u547d\u4ee4\u9000\u51fa\u72b6\u6001\uff1a{exit_status}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u83b7\u53d6\u547d\u4ee4\u8f93\u51fa<\/h4>\n<\/p>\n
\u867d\u7136os.system()<\/code>\u53ef\u4ee5\u6267\u884c\u547d\u4ee4\uff0c\u4f46\u65e0\u6cd5\u83b7\u53d6\u5176\u8f93\u51fa\u3002\u82e5\u9700\u8981\u83b7\u53d6\u547d\u4ee4\u8f93\u51fa\uff0c\u53ef\u4ee5\u4f7f\u7528subprocess<\/code>\u6a21\u5757\u3002<\/p>\n<\/p>\n
import subprocess<\/p>\n
result = subprocess.run(['echo', 'Hello, World!'], capture_output=True, text=True)<\/p>\n
print(result.stdout)  # \u8f93\u51fa\u547d\u4ee4\u7684\u6807\u51c6\u8f93\u51fa<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u73af\u5883\u53d8\u91cf<\/h3>\n<\/p>\n
os\u6a21\u5757\u53ef\u4ee5\u83b7\u53d6\u548c\u8bbe\u7f6e\u7cfb\u7edf\u73af\u5883\u53d8\u91cf\uff0c\u8fd9\u5728\u914d\u7f6e\u7a0b\u5e8f\u8fd0\u884c\u73af\u5883\u65f6\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n
1. \u83b7\u53d6\u73af\u5883\u53d8\u91cf<\/h4>\n<\/p>\n
\u4f7f\u7528os.getenv(key)<\/code>\u53ef\u4ee5\u83b7\u53d6\u6307\u5b9a\u73af\u5883\u53d8\u91cf\u7684\u503c\u3002<\/p>\n<\/p>\n
path = os.getenv('PATH')<\/p>\n
print(f"PATH\u73af\u5883\u53d8\u91cf\u7684\u503c\u662f\uff1a{path}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u8bbe\u7f6e\u73af\u5883\u53d8\u91cf<\/h4>\n<\/p>\n
\u4f7f\u7528os.environ<\/code>\u53ef\u4ee5\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf\u3002<\/p>\n<\/p>\n
os.environ['NEW_VAR'] = 'some_value'<\/p>\n
print(f"NEW_VAR\u7684\u503c\u662f\uff1a{os.getenv('NEW_VAR')}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e94\u3001\u8def\u5f84\u64cd\u4f5c<\/h3>\n<\/p>\n
os\u6a21\u5757\u7684os.path<\/code>\u5b50\u6a21\u5757\u63d0\u4f9b\u4e86\u4e00\u4e9b\u7528\u4e8e\u8def\u5f84\u64cd\u4f5c\u7684\u4fbf\u6377\u51fd\u6570\u3002<\/p>\n<\/p>\n
1. \u8def\u5f84\u62fc\u63a5<\/h4>\n<\/p>\n
\u4f7f\u7528os.path.join()<\/code>\u53ef\u4ee5\u62fc\u63a5\u8def\u5f84\uff0c\u907f\u514d\u624b\u52a8\u4f7f\u7528\u8def\u5f84\u5206\u9694\u7b26\u3002<\/p>\n<\/p>\n
full_path = os.path.join('\/path\/to\/directory', 'file.txt')<\/p>\n
print(f"\u5b8c\u6574\u8def\u5f84\u662f\uff1a{full_path}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u5224\u65ad\u8def\u5f84\u662f\u5426\u5b58\u5728<\/h4>\n<\/p>\n
\u4f7f\u7528os.path.exists(path)<\/code>\u53ef\u4ee5\u5224\u65ad\u6587\u4ef6\u6216\u76ee\u5f55\u662f\u5426\u5b58\u5728\u3002<\/p>\n<\/p>\n
if os.path.exists(full_path):<\/p>\n
    print("\u8def\u5f84\u5b58\u5728")<\/p>\n
else:<\/p>\n
    print("\u8def\u5f84\u4e0d\u5b58\u5728")<\/p>\n
<\/code><\/pre>\n<\/p>\n
3. \u5224\u65ad\u6587\u4ef6\u548c\u76ee\u5f55<\/h4>\n<\/p>\n
\u4f7f\u7528os.path.isfile(path)<\/code>\u548cos.path.isdir(path)<\/code>\u53ef\u4ee5\u5206\u522b\u5224\u65ad\u8def\u5f84\u662f\u5426\u662f\u6587\u4ef6\u6216\u76ee\u5f55\u3002<\/p>\n<\/p>\n
if os.path.isfile(full_path):<\/p>\n
    print("\u8fd9\u662f\u4e00\u4e2a\u6587\u4ef6")<\/p>\n
elif os.path.isdir(full_path):<\/p>\n
    print("\u8fd9\u662f\u4e00\u4e2a\u76ee\u5f55")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u516d\u3001\u6df1\u5165os\u6a21\u5757\u7684\u5e94\u7528<\/h3>\n<\/p>\n
os\u6a21\u5757\u7684\u529f\u80fd\u4e0d\u4ec5\u9650\u4e8e\u6587\u4ef6\u548c\u76ee\u5f55\u64cd\u4f5c\uff0c\u8fd8\u53ef\u4ee5\u7528\u4e8e\u8fdb\u7a0b\u7ba1\u7406\u3001\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7b49\u9ad8\u7ea7\u64cd\u4f5c\u3002<\/p>\n<\/p>\n
1. \u8fdb\u7a0b\u7ba1\u7406<\/h4>\n<\/p>\n
os\u6a21\u5757\u63d0\u4f9b\u4e86os.fork()<\/code>\u7528\u4e8e\u521b\u5efa\u5b50\u8fdb\u7a0b\uff08\u4ec5\u5728\u7c7bUnix\u7cfb\u7edf\u4e0a\u53ef\u7528\uff09\u3002\u5728Windows\u4e0a\uff0c\u53ef\u4ee5\u4f7f\u7528multiprocessing<\/code>\u6a21\u5757\u4ee3\u66ff\u3002<\/p>\n<\/p>\n
pid = os.fork()<\/p>\n
if pid == 0:<\/p>\n
    # \u5b50\u8fdb\u7a0b<\/p>\n
    print("\u8fd9\u662f\u5b50\u8fdb\u7a0b")<\/p>\n
else:<\/p>\n
    # \u7236\u8fdb\u7a0b<\/p>\n
    print(f"\u8fd9\u662f\u7236\u8fdb\u7a0b\uff0c\u5b50\u8fdb\u7a0b\u7684PID\u662f{pid}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u83b7\u53d6\u8fdb\u7a0bID<\/h4>\n<\/p>\n
\u4f7f\u7528os.getpid()<\/code>\u548cos.getppid()<\/code>\u53ef\u4ee5\u5206\u522b\u83b7\u53d6\u5f53\u524d\u8fdb\u7a0b\u548c\u7236\u8fdb\u7a0b\u7684ID\u3002<\/p>\n<\/p>\n
print(f"\u5f53\u524d\u8fdb\u7a0bID\uff1a{os.getpid()}")<\/p>\n
print(f"\u7236\u8fdb\u7a0bID\uff1a{os.getppid()}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e03\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
os\u6a21\u5757\u662fPython\u4e2d\u4e00\u4e2a\u5f3a\u5927\u4e14\u7075\u6d3b\u7684\u6a21\u5757\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u4e0e\u64cd\u4f5c\u7cfb\u7edf\u4ea4\u4e92\u7684\u51fd\u6570\u548c\u65b9\u6cd5\u3002\u901a\u8fc7os\u6a21\u5757\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u65b9\u4fbf\u5730\u8fdb\u884c\u6587\u4ef6\u548c\u76ee\u5f55\u7ba1\u7406\u3001\u6267\u884c\u7cfb\u7edf\u547d\u4ee4\u3001\u83b7\u53d6\u548c\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf\u7b49\u64cd\u4f5c\u3002\u6b64\u5916\uff0cos\u6a21\u5757\u8fd8\u652f\u6301\u8def\u5f84\u64cd\u4f5c\u3001\u8fdb\u7a0b\u7ba1\u7406\u7b49\u9ad8\u7ea7\u529f\u80fd\uff0c\u4f7f\u5f97\u5176\u5728\u7cfb\u7edf\u7f16\u7a0b\u548c\u81ea\u52a8\u5316\u4efb\u52a1\u4e2d\u5f97\u5230\u4e86\u5e7f\u6cdb\u5e94\u7528\u3002<\/p>\n<\/p>\n
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