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| 1 | +''' |
| 2 | +Exercise 16: Password Generator |
| 3 | + |
| 4 | +Write a password generator in Python. Be creative with how |
| 5 | +you generate passwords - strong passwords have a mix of lowercase |
| 6 | +letters, uppercase letters, numbers, and symbols. The passwords |
| 7 | +should be random, generating a new password every time the user |
| 8 | +asks for a new password. Include your run-time code in a main method. |
| 9 | + |
| 10 | +Extra: |
| 11 | + |
| 12 | +Ask the user how strong they want their password to be. For weak |
| 13 | +passwords, pick a word or two from a list. |
| 14 | + |
| 15 | +''' |
| 16 | + |
| 17 | +# Solution |
| 18 | +def generate_passwords(level): |
| 19 | + """ |
| 20 | + Generate password of specific level. |
| 21 | + |
| 22 | + Arguments: |
| 23 | + level -- password security level. 8 characters for low, 12 for |
| 24 | + middle, and 16 for high. In each pattern, the password is a |
| 25 | + mix of lowercase letters, uppercase letters, numbers, and symbols. |
| 26 | + |
| 27 | + Returns: |
| 28 | + password -- a password string. |
| 29 | + """ |
| 30 | + import string |
| 31 | + import random |
| 32 | + |
| 33 | + level_dict = {'low':8, 'middle':12, 'high':16} |
| 34 | + |
| 35 | + segment = [0, 0, 0, 0] |
| 36 | + for x in range(level_dict[level]): |
| 37 | + r = random.randint(0,3) |
| 38 | + segment[r] += 1 |
| 39 | + |
| 40 | + lower_letter = random.choices(string.ascii_lowercase, k=segment[0]) |
| 41 | + upper_letter = random.choices(string.ascii_uppercase, k=segment[1]) |
| 42 | + digits = random.choices(string.digits, k=segment[2]) |
| 43 | + symbols = random.choices('!@#$%^&*()_+', k=segment[3]) |
| 44 | + |
| 45 | + password = lower_letter + upper_letter + digits + symbols |
| 46 | + random.shuffle(password) |
| 47 | + |
| 48 | + return ''.join(password) |
| 49 | + |
| 50 | +def check_level_input(string, level): |
| 51 | + """ |
| 52 | + Check the input string is a level or not. |
| 53 | + |
| 54 | + Arguments: |
| 55 | + string -- input string. |
| 56 | + level -- correct level string. |
| 57 | + |
| 58 | + Returns: |
| 59 | + True/False -- if the input is correct level, return True, else return false. |
| 60 | + """ |
| 61 | + if string.lower() == level or string.lower() == level.lower()[0]: |
| 62 | + return True |
| 63 | + else: |
| 64 | + return False |
| 65 | + |
| 66 | +def main(): |
| 67 | + while True: |
| 68 | + level = input('Choose your password security level: [low/middle/high]') |
| 69 | + if level.lower() == 'exit': |
| 70 | + break |
| 71 | + elif check_level_input(level, 'low'): |
| 72 | + print(generate_passwords('low')) |
| 73 | + elif check_level_input(level, 'middle'): |
| 74 | + print(generate_passwords('middle')) |
| 75 | + elif check_level_input(level, 'high'): |
| 76 | + print(generate_passwords('high')) |
| 77 | + else: |
| 78 | + print('Input error.') |
| 79 | + |
| 80 | +if __name__ == "__main__": |
| 81 | + main() |
| 82 | + |
| 83 | +# Test Part |
| 84 | +# Choose your password security level: [low/middle/high]low |
| 85 | +# #*ug38Gu |
| 86 | +# Choose your password security level: [low/middle/high]mi |
| 87 | +# Input error. |
| 88 | +# Choose your password security level: [low/middle/high]middle |
| 89 | +# N*(&wB_If1#R |
| 90 | +# Choose your password security level: [low/middle/high]high |
| 91 | +# _)6oC03@y%BJj)u9 |
| 92 | +# Choose your password security level: [low/middle/high]high |
| 93 | +# jEby&f8$^59z9l%K |
| 94 | +# Choose your password security level: [low/middle/high]exit |
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