open and close windows console from python

Question

I am trying to write a script to open the windows console, then install a python package with pip and finally close.

This was my initial try

import os os.system('pip install package')

The installations fails. It seems I need to open first the console and then pip, to make it work so 2nd try

import os os.system('cmd.exe') os.system('pip install package')

If I do it in this way it is waiting until the console is closed to execute pip

3rd try

import os os.system('cmd.exe') os.system('exit') os.system('pip install package')

Exit is not recognised

I tried also with os.system('taskkill cmd.exe')

or

import sys sys.exit()

or

raise SystemExit

No success so far

os.system('C:\Python\Python35-32\Scripts\pip install package') - give path to pip on your system — Mrunmoy
– Mrunmoy, Commented May 12, 2016 at 7:55

patthoyts · Accepted Answer · 2016-05-12 07:56:07Z

pip is a package. This means you can do import pip and run the python function directly. A quick look using help(pip) shows there is a pip.commands package which provides install which looks promising.

You cannot run multiple system commands as your earlier examples. Each such command will run in a separate subprocess. Most likely os.system("cmd /c pip install package") might have worked as that runs a cmd shell and passes a command to it to be run. I'd expect to have to pass the full path to the pip executable though.

os.system already runs using cmd /c. But you don't need the cmd shell. It works with subprocess.call without shell=True. pip.exe opens its own console window (that's conhost.exe, not cmd.exe) if it doesn't inherit one. When pip exits, so does conhost if no other program has attached to it.

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