Password Generator

Build a secure password generator that creates random passwords based on user-specified length and character sets, using list comprehensions, the random module, and string constants.

Requirements

1. Ask the user for the desired password length.
2. Ask the user which character types to include: lowercase, uppercase, digits, symbols.
3. Use Python's string module constants (string.ascii_lowercase, string.ascii_uppercase, string.digits, string.punctuation).
4. Combine selected character sets into a single pool using a list comprehension or string concatenation.
5. Use random.choice() in a loop or comprehension to generate the password.
6. Validate that at least one character type is selected and length is reasonable (e.g., >= 4).
7. Allow generating multiple passwords without restarting the program.

import random
import string

def generate_password(length, use_lower, use_upper, use_digits, use_symbols):
    pool = ""
    if use_lower:
        pool += string.ascii_lowercase
    if use_upper:
        pool += string.ascii_uppercase
    if use_digits:
        pool += string.digits
    if use_symbols:
        pool += string.punctuation

    if not pool:
        raise ValueError("At least one character type must be selected.")

    password = "".join(random.choice(pool) for _ in range(length))
    return password

def ask_yes_no(prompt):
    return input(prompt).strip().lower() in ("y", "yes")

def main():
    while True:
        try:
            length = int(input("Password length (min 4): "))
            if length < 4:
                print("Length must be at least 4.")
                continue
        except ValueError:
            print("Please enter a valid number.")
            continue

        use_lower = ask_yes_no("Include lowercase letters? (y/n): ")
        use_upper = ask_yes_no("Include uppercase letters? (y/n): ")
        use_digits = ask_yes_no("Include digits? (y/n): ")
        use_symbols = ask_yes_no("Include symbols? (y/n): ")

        try:
            password = generate_password(length, use_lower, use_upper, use_digits, use_symbols)
            print(f"\nGenerated Password: {password}\n")
        except ValueError as e:
            print(f"Error: {e}")
            continue

        if not ask_yes_no("Generate another password? (y/n): "):
            print("Goodbye!")
            break

if __name__ == "__main__":
    main()

50 XP on completion Back to Day 7

Your Code

import random
import string

def generate_password(length, use_lower, use_upper, use_digits, use_symbols):
    # TODO: build the character pool based on selected options
    # TODO: use a list comprehension with random.choice to build the password
    pass

# Example usage
print(generate_password(12, True, True, True, True))

Output

Click "Run" to execute your code...