Print bash history using python

Question

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)

but they prompt an error

 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

Possible duplicate of Popen error: [Errno 2] No such file or directory — Avishay Cohen
– Avishay Cohen, Commented Nov 28, 2018 at 11:28
You also want to avoid raw Popen as recommended in its documentation. See perhaps further stackoverflow.com/a/51950538/874188 — tripleee
– tripleee, Commented Nov 28, 2018 at 11:49

Kit. · Accepted Answer · 2018-11-28 11:38:41Z

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

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

Or to manually specify the shell you want to call.

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

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

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

cody · Accepted Answer · 2018-11-28 11:58:51Z

Kit is correct, reading ~/.bash_history may be a better option:

from os.path import join, expanduser with open(join(expanduser('~'), '.bash_history'), 'r') as f: for line in f: print(line)

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