Fucntion to check and install missing packages

pkg_requirement.py

import re
import sys
import subprocess

def pkg_requirement(*pkgs):
	output = subprocess.check_output((['pip', 'list']))
	outputDecode = output.decode("utf-8")
	#print(outputDecode)
	pipList = re.split(r'\s', outputDecode)
	pipNeed = []
	for pkg in pkgs:
		if not pkg in pipList:
			print(pkg + ' not installed')
			pipNeed.append(pkg)
		else:
			print(pkg + ' already installed')
	#print(pipNeed)
	for pkg in pipNeed:
		subprocess.call([sys.executable, "-m", "pip", "install", pkg])