TSquish | Password Generator

#!/usr/bin/python
import sys
from random import choice

def main():
    if sys.argv[1] == "-h":
        exit("Usage: $ %s length amount\nEx: $ %s 5 4 will print 4 passwords all 5 characters in length" % (sys.argv[0], sys.argv[0]))
    try:
        len_pass = int(sys.argv[1])
    except IndexError:
        len_pass = 5
    try:
        amount_pass = int(sys.argv[2])
    except IndexError:
        amount_pass = 1

    passwords = []
    for i in range(amount_pass):
        passwords.append(make_pass(len_pass))

    for words in  passwords:
        print words

def rand_char():
    chars = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'l', 'm', 'n',
             'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',]

    return choice(chars)

def make_pass(length):
    password = ""
    for i in range(length):
        password += rand_char()
    return password


if __name__ == "__main__":
    main()