Table of Contents
处理子进程, 可以替代 os.system,并提供更丰富的操作。
参考:
基本函数
subprocess.call(args, *, stdin=None, stdout=None, stderr=None, shell=False)-
class subprocess.Popen(args, bufsize=0, executable=None, stdin=None, stdout=None, stderr=None, preexec_fn=None, close_fds=False, shell=False, cwd=None, env=None, universal_newlines=False, startupinfo=None, creationflags=0) -
执行基本的shell命令
subprocess.call('ls -l', shell=True) subprocess.call(['ls', '-l']) subprocess.Popen('ls -l', shell=True) subprocess.Popen(['ls', '-l'])
- 和子进程交互
# 读取子进程的stdout p = subprocess.Popen('ls -l', shell=True, stdout=subprocess.PIPE) print p.stdout.read() # 发送数据给子进程的stdin p = subprocess.Popen('cat', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) stdout, stderr = p.communicate('data1\ndata2\ndata3')
- 返回值
from subprocess import * output = check_output(["mycmd", "myarg"]) # output=`mycmd myarg`