Python - password_generator.py

#!/usr/bin/env python3

#  Why importing tons of functions, when I can import the only the 6 I need?

from sys import exit
from random import choice
from string import ascii_letters, digits, punctuation

#
# Using try - except trap to verify if input data is a number
# if not then exit with exit code -9
#

try:
    password_length=int(input('\nDigit the lentgh of password to generate: '))
except:
    print("\nA number whas required!!\n")
    exit(-9)

#
# A faster way to concatenate strings is .join() the + method is really slow and deprecated
#
password_characters=''.join([ascii_letters,digits,punctuation])

password = []

for x in range(password_length):
    password.append(choice(password_characters))
#
# using the f-string is more python in printing in version 3
#
print(f"\n{''.join(password)} \n")

A lighter version could be obtained using a constant and not importing libraries like in this git:

https://gist.github.com/Igaryu/a0498c843a10f3d502d78a862bd7f2db