Password generator CLI (with Python)

pwgen

#!/usr/bin/env python3

# This Python script can quickly generate passwords.
# Simply type 'pwgen' into the terminal.
# Options:
#   -l or --length to set the length. Default is 20.
#   -a or --alphanumeric to generate an alphanumeric password: no special characters.

import argparse
import random
import string
import pyperclip


def generate_password(length: int = 20, alphanumeric: bool = False) -> str:
    characters = (
        string.ascii_letters + string.digits
        if alphanumeric
        else string.ascii_letters + string.digits + string.punctuation
    )
    return "".join(random.choices(characters, k=length))


def main():
    parser = argparse.ArgumentParser(description="Generate a random password.")
    parser.add_argument(
        "-l",
        "--length",
        type=int,
        default=20,
        help="Length of the password (default: 20)",
    )
    parser.add_argument(
        "-a",
        "--alphanumeric",
        action="store_true",
        help="Generate an alphanumeric password (no special characters)",
    )
    args = parser.parse_args()

    password = generate_password(args.length, args.alphanumeric)

    print(password)
    pyperclip.copy(password)

    print("Password copied to clipboard!")


if __name__ == "__main__":
    main()

Instructions (for macOS)

1. Move the script file to /usr/local/bin/pwgen (no file extension)
2. Make it executable with chmod +x /usr/local/bin/pwgen

Now you can type pwgen anywhere.

Usage

pwgen
pwgen -l 30 -a
pwgen --help