password-generator-cli/password_generator.py
2021-12-16 21:04:00 -05:00

110 lines
3.9 KiB
Python

import random
class PasswordGenerator():
"""
Password Generator class to create random passwords based on the users
preferences for uppercase, numbers, and symbols. Ambiguous characters
('l' [Lower case L], '1' [one], I [capital i], O [capital o], 0 [zero]) are
omitted by default.
"""
def __init__(self, length, uchars, nums, symbols):
"""
Initializes a PasswordGenerator object. Includes private data members
for the possible upper and lowercase letters, numbers, symbols, and the
set of characters available for password creation based on user input.
Takes the users desired password length, and whether to use uppercase
letters, numbers, and symbols as parameters.
"""
self._lchars = ('q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', 'a',
's', 'd', 'f', 'g', 'h', 'j', 'k', 'z', 'x', 'c',
'v', 'b', 'n', 'm')
self._uchars = ('Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'P', 'A',
'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', 'Z', 'X', 'C',
'V', 'B', 'N', 'M')
self._nums = ('2','3','4','5','6','7','8','9')
self._symbols = ('!', '@', '#', '$', '%', '^', '&', '*')
self._available_chars = self._lchars
self._length = length
self._use_uchars = uchars
self._use_nums = nums
self._use_symbols = symbols
def use_upper(self):
"""
Checks if the user wants uppercase letters in the password. If yes,
adds the uppercase letters to possible characters for the password.
"""
if self._use_uchars.lower() == 'n':
return
else:
self._available_chars += self._uchars
def use_nums(self):
"""
Checks if the user wants numbers in the password. If yes, adds
the numbers to the possible characters for the password.
"""
if self._use_nums.lower() == 'n':
return
else:
self._available_chars += self._nums
def use_symbols(self):
"""
Checks if the user wants symbols in the password. If yes, adds the
symbols to the possible characters for the password."
"""
if self._use_symbols.lower() == 'n':
return
else:
self._available_chars += self._symbols
def create_password(self):
"""
Uses the use_upper, use_nums, and use_symbols methods to determine the
possible characters that should be considered and generates the
password.
"""
password = ''
self.use_upper()
self.use_nums()
self.use_symbols()
while len(password) < self._length:
password += random.choice(self._available_chars)
print('\nYour new password is: ', password)
print('\n')
def main():
"""
Main function to prompt user for password length, and whether to include
uppercase letters, numbers, and symbols in the password. Uses the
PasswordGenerator class and it's create_password member function to
generate and print the new password to the console.
"""
print('\n')
print('======================')
print('| Password Generator |')
print('======================')
print('\nNote that ambiguous characters such as 0 (zero) and O (capital o) \
are automatically excluded! Press Ctrl+C to quit.\n')
length = ''
while length is not int:
try:
length = int(input('How many characters for your password? '))
break
except ValueError:
print('Please enter an integer.')
use_uchars = input('Use uppercase? [Y/n] ')
use_nums = input('Use numbers? [Y/n] ')
use_symbols = input('Use symbols? [Y/n] ')
PasswordGenerator(length, use_uchars, use_nums, use_symbols).create_password()
if __name__ == '__main__':
main()