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我只是想调用tracert
并以字符串形式得到结果。看起来tracert
调用工作正常,因为在发生错误之前结果显示在控制台上。调用子进程时,“ValueError:关闭文件上的I/O操作”
import subprocess
import sys
proc = subprocess.Popen(["tracert", "localhost"], stderr=subprocess.PIPE, stdin=subprocess.PIPE)
print proc.communicate()[0]
错误:
Traceback (most recent call last):
File "-", line 207, in <module>
main()
File "-", line 203, in main
tracert("localhost")
File "-", line 188, in tracert
print proc.communicate()[1]
ValueError: I/O operation on closed file
UPDATE: 我试过logging
代替print
,因为它是无缓冲。
2017-09-07 09:11:57,165 - [test] - INFO -
Routenverfolgung zu localhost [::1]
�ber maximal 30 Hops:
1 <1 ms <1 ms <1 ms localhost [::1]
Ablaufverfolgung beendet.
Traceback (most recent call last):
File "-\lib\logging\__init__.py", line 885, in emit
self.flush()
File "-\logging\__init__.py", line 845, in flush
self.stream.flush()
ValueError: I/O operation on closed file
如果我不得不猜测我会说这是因为'tracert'关闭了它的'stdin'。 – NPE