python子进程设置shell var。 然后运行命令 - 如何？

Question

I need to do this:

$ export PYRO_HMAC_KEY=123
$ python -m Pyro4.naming

So, i found that the second one is possible to do with

subprocess.Popen(['python','-m','Pyro4.naming'])

but how export shell variable before that?

Answer 1

To update the existing environment...

import os, subprocess

d = dict(os.environ)   # Make a copy of the current environment
d['PYRO_HMAC_KEY'] = '123'
subprocess.Popen(['python', '-m', 'Pyro4.naming'], env=d)

Answer 2

子进程函数接受一个env参数，该参数可以给出要在进程中使用的环境变量的映射：

subprocess.Popen(['python','-m','Pyro4.naming'], env={'PYRO_HMAC_KEY': '123'})

Answer 3

尝试os.putenv（）： http ：//docs.python.org/library/os.html#os.putenv