path.join(basedir, chart_file) ret = command() print(ret) import subprocess import os import sys import multiprocessing from argparse import ArgumentParser def run_cmd(cmd): process = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) stdout_data, stderr_data =...
print('开始下载%s...' % filename) time_to_download = randint(5, 10) sleep(time_to_download) print('%s下载完成! 耗费了%d秒' % (filename, time_to_download)) def main(): start = time() p1 = Process(target=download_task, args=('Python从入门到住院.pdf', )) p1.start() p2 = ...
importsubprocesstry:result=subprocess.run(["ls","-l"],check=True,capture_output=True,text=True)print(result.stdout)exceptsubprocess.CalledProcessErrorase:print("Command execution failed:",e) 1. 2. 3. 4. 5. 6. 7. 上述代码中的check=True参数用于在命令执行失败时引发异常。如果不需要引发异常,...
一、os模块: 1#coding:utf-82importos#导入os模块 3command = os.system('netstat')#os.system获取不到返回值 1#coding:utf-82importos#导入os模块34command = os.popen('ping www.baidu.com')#os.popen可以获取到返回值5printcommand.read() 二、subprocess模块: subprocess.run(*popenargs, input=None, ...
python subprocess 执行Linux指令 定义一个可以执行command的function: defexecute(shell_command_str=None, timeout=None, encoding="utf-8", check=True):assertshell_command_strisnotNone,"Please enter a shell command."result = subprocess.run(shell_command_str, shell=True, timeout=timeout, encoding=...
当从外部输入生成命令参数时,需特别注意避免命令注入(command injection)漏洞。建议使用列表形式的参数传递,以确保参数被正确地处理而不是直接作为命令执行。 ```python # 不推荐:可能导致命令注入 command = f"ls {user_input}" subprocess.run(command, shell=True) ...
p=subprocess.Popen('java',shell=True,stdout=subprocess.PIPE,stderr=subprocess.STDOUT,encoding='gb2312')# 输出stdoutprint(p.communicate()[0]) 得到 代码语言:javascript 复制 用法:java[-options]class[args...](执行类)或 java[-options]-jar jarfile[args...](执行 jar 文件)其中选项包括:-d32 使...
import subprocess try: subprocess.run(['false'], check=True) except subprocess.CalledProcessError as err: print('ERROR:', err) 运行结果 ERROR: Command '['false']' returned non-zero exit status 1. false 命令总是以非零状态代码退出,run()将其解释为错误。
defcmd(command): subp=subprocess.Popen(command,shell=True,stdout=subprocess.PIPE,stderr=subprocess.PIPE,encoding="utf-8") subp.wait(2) ifsubp.poll()==0: print(subp.communicate()[1]) else: print("失败") cmd("java -version")
subprocess 模块允许我们启动一个新进程,并连接到它们的输入/输出/错误管道,从而获取返回值。 Popen 是 subprocess的核心,子进程的创建和管理都靠它处理。 subprocess.Popen subprocess模块定义了一个类:Popen class Popen(object): """ Execute a child program in a new process. ...