[英]How do I restart a python script running inside of a screen using a bash script?
[英]Using Python to ssh then run bash script. The output of the running bash script i need to display on the screen
我正在使用Python(OSX Python 2.7.10)ssh進入Debian框(Python 2.7.9),然后運行bash腳本(./capture)。 bash腳本包含一些tcpdump命令。 我無法弄清的問題是如何在終端上顯示正在運行的bash腳本的實時結果。
#!/usr/bin/env python3
import subprocess, os
output = subprocess.run(["ssh", "ju@192.168.199.125", "sudo ./capture"])
print(output)
我能夠ssh,並成功運行腳本,但是沒有任何輸出。 當我按CTRL CI時,得到以下跟蹤:
**^CTraceback (most recent call last):
File "/Users/junesjoseph/run.py", line 3, in <module>
output = subprocess.run(["ssh", "junes@192.168.199.125", "sudo ./capture"])
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/subprocess.py", line 405, in run
stdout, stderr = process.communicate(input, timeout=timeout)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/subprocess.py", line 835, in communicate
self.wait()
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/subprocess.py", line 1457, in wait
(pid, sts) = self._try_wait(0)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/subprocess.py", line 1404, in _try_wait
(pid, sts) = os.waitpid(self.pid, wait_flags)
KeyboardInterrupt**
任何幫助是極大的贊賞。 謝謝
subprocess.run
返回的對象是CompletedProcess
對象, CompletedProcess
對象的屬性包含已完成過程的stdout
和stderr
。 您不想直接打印它,但是可以使用它來獲取要打印的屬性。
import subprocess # no reason to import os
subssh = subprocess.run(["ssh", "ju@192.168.199.125", "sudo ./capture"],
# Set up for capturing stdout and stderr
stdout=subprocess.PIPE, stderr=subprocess.PIPE,
# Add commonly useful attributes
check=True, universal_newlines=True)
print(subssh.output)
如果您確實只希望將輸出顯示在標准輸出上,則對其進行捕獲以進行打印基本上是多余的。 只需將其設置為直接顯示即可,只需不將stdout
或stderr
設置為任何值即可:
subssh = subprocess.run(["ssh", "ju@192.168.199.125", "sudo ./capture"],
# Don't set up for capturing -- leave stdout and stderr alone
check=True, universal_newlines=True)
也許也可以參閱《 在Python中運行Bash命令》,其中我已經發布了有關subprocess
常見問題的更詳細的答案。
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