parse-passwd.py

#!/usr/bin/env python

file = "/etc/passwd"
file_object = open(file, 'r')

shell = {}
for line in file_object:
    line = line.strip()
    fields = line.split(":")
    shell[fields[0]] = fields[-1]

file_object.close()

for user in shell.keys():
    print("{0:11} => {1}".format(user, shell[user]))

Thanks. I was just playing around.