如何在python中获取终端输出？

import subprocess
>>> cmd = [ ‘echo’, ‘arg1’, ‘arg2’ ]
>>> output = subprocess.Popen( cmd, stdout=subprocess.PIPE ).communicate()[0]
>>> print output
arg1 arg2

>>>

使用subprocess.PIPE时存在错误。对于巨大的输出，请使用以下命令：

import subprocessimport tempfilewith tempfile.TemporaryFile() as tempf:    proc = subprocess.Popen(['echo', 'a', 'b'], stdout=tempf)    proc.wait()    tempf.seek(0)    print tempf.read()