使用 python 打印 bash 历史记录 [英] Print bash history using python

问题描述

我必须使用子进程包打印 bash 历史记录.

I have to print bash history using subprocess package.

import subprocess
co = subprocess.Popen(['history'], stdout = subprocess.PIPE)
History = co.stdout.read()  
print("----------History----------" + "\n" + History)

但他们提示错误

 Traceback (most recent call last):
  File "test.py", line 4, in <module>
    co = subprocess.Popen(['history'], stdout = subprocess.PIPE)
  File "/usr/lib/python2.7/subprocess.py", line 394, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1047, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

推荐答案

通常，您需要在 Popen 调用中添加 shell=True 参数:

Normally, you would need to add shell=True argument to your Popen call:

co = subprocess.Popen(['history'], shell=True, stdout = subprocess.PIPE)

或者手动指定要调用的shell.

Or to manually specify the shell you want to call.

co = subprocess.Popen(['/bin/bash', '-c', 'history'], stdout = subprocess.PIPE)

不幸的是，在这种特殊情况下它无济于事，因为 bash 在非交互式使用时具有空历史记录.

Unfortunately, in this particular case it won't help, because bash has empty history when used non-interactively.

一个可行的解决方案是手动读取 ${HOME}/.bash_history.

A working solution would be to read ${HOME}/.bash_history manually.

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