PASSWORD GENERATOR USING PYTHON

Program : 

import random
import string

lower = string.ascii_lowercase  # abcdefghijklmnopqrstuvwxyz
upper = string.ascii_uppercase  # ABCDEFGHIJKLMNOPQRSTUVWXYZ
letters = string.ascii_letters  # abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
punc = string.punctuation  # !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~
digits = string.digits  # 0123456789

def password(length, num=False, strength="risky"):
    """length -> no of characters,
    num -> if True returns password with numbers,
    strength -> risky, weak, strong"""

    pwd = ""

    # If the value of default variable strength is 'risky'
    if strength == "risky":
        if num:
            length = length - 2
            for i in range(2):
                pwd = pwd + random.choice(digits)
        for i in range(length):
            pwd = pwd + random.choice(lower)

    # If the value of default variable strength is 'weak'
    elif strength == "weak":
        if num:
            length = length - 2
            for i in range(2):
                pwd = pwd + random.choice(digits)

        length = length - 2
        for i in range(2):
            pwd = pwd + random.choice(upper)

        for i in range(length):
            pwd = pwd + random.choice(lower)

    # If the value of default variable strength is 'strong'
    elif strength == "strong":
        if length < 7:
            print("To get very strong password, length must be greater than 7")
        else:
            if num:
                length = length - 3
                for i in range(3):
                    pwd = pwd + random.choice(digits)

            length = length - 2
            for i in range(2):
                pwd = pwd + random.choice(upper)

            length = length - 1
            for i in range(1):
                pwd = pwd + random.choice(punc)

            for i in range(length):
                pwd = pwd + random.choice(lower)

    # print(pwd)
    pwd = list(pwd)
    # print(pwd)
    random.shuffle(pwd)
    pwd = ''.join(pwd)
    return pwd

length = int(input("Enter length: "))

print("Risky Password")
print(password(length))
print(password(length, num=True))
print()

print("Weak Password")
print(password(length, strength="weak"))
print(password(length, num=True, strength="weak"))
print()

print("Strong Password")
print(password(length, strength="strong"))
print(password(length, num=True, strength="strong"))
print()

Output : 

Case 1 :

Case 2 :

Also Refer : For loop patterns using Python.