3
任何人都可以解釋爲什麼我得到這個錯誤,如果我運行通信功能兩次?無法運行兩次Popen.communicate()。 (Python子進程模塊)
例如
from subprocess import *
SVN=Popen('which svn', shell=True, stdout=PIPE)
print SVN.communicate()[0]
回報
"/usr/bin/svn"
但運行再次溝通......
print SVN.communicate()[0]
回報......
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