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任何人都可以解释为什么我得到这个错误,如果我运行通信功能两次?无法运行两次Popen.communicate()。 (Python子进程模块)
例如
from subprocess import *
SVN=Popen('which svn', shell=True, stdout=PIPE)
print SVN.communicate()[0]
回报
"/usr/bin/svn"
但运行再次沟通......
print SVN.communicate()[0]
回报......
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 746, in communicate
stdout = _eintr_retry_call(self.stdout.read)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 478, in _eintr_retry_call
return func(*args)
ValueError: I/O operation on closed file