命令执行的python超时（如果未在5秒内完成）

Question

如果命令无法在5秒内完成，那么添加超时的最佳方法是什么

from subprocess import check_output
try:
    check_output("dh")
except Notexecuted:
    print"command not successful executed"

版本=python2.7

Answer 1

在Python2.7中，我们没有直接实现带有子进程的超时函数。相反，我建议使用subprocess32包

from subprocess32 import Popen, PIPE

cmd = "<your command>"
response = Popen(cmd, stdout=PIPE, stderr=PIPE)
stdout, stderr = response.communicate(timeout=5)

（在python3.x中，我们有一个timeout参数，默认值为subprocess）

注：参考documentation

POSIX users (Linux, BSD, etc.) are strongly encouraged to install and use the much more recent subprocess32 module instead of the version included with python 2.7. It is a drop in replacement with better behavior in many situations.

希望这对你有帮助