Popen和python

Question

处理一些代码,我从命令提示符运行时遇到错误...

NameError: name 'Popen' is not defined

但我已经导入了两个import os和import sys.

这是代码的一部分

exepath = os.path.join(EXE File location is here)
exepath = '"' + os.path.normpath(exepath) + '"'
cmd = [exepath, '-el', str(el), '-n', str(z)]

print 'The python program is running this command:'
print cmd

process = Popen(cmd, stderr=STDOUT, stdout=PIPE)
outputstring = process.communicate()[0]

我错过了一些基本的东西吗 我不怀疑.谢谢!

Answer 1

你应该做:

import subprocess
subprocess.Popen(cmd, stderr=subprocess.STDOUT, stdout=subprocess.PIPE)
# etc.

Answer 2

Popen在子进程模块中定义

import subprocess
...
subprocess.Popen(...)

要么:

from subprocess import Popen
Popen(...)