Password Generator (CLI)

A simple command-line password generator built as a Python practice project. Lets you choose the password length and which character types to include (lowercase is always included; numbers, uppercase, and symbols are optional).

Folder Structure

.
├── main.py       # App entry point
├── helper.py     # Reusable y/n input validation helper
├── README.md
├── .gitignore
└── LICENSE

Usage

Run the app:

python main.py

You'll be prompted for a length, then asked which character types to include:

Enter password length: 12
Include numbers? (y/n): y
Include uppercase? (y/n): y
Include symbols? (y/n): n
Generated password: qk3jRt9mZxo1

How It Works

• helper.py contains ask(), which repeatedly prompts a yes/no question until the user enters y or n.
• main.py builds up a pool of allowed characters based on the user's choices, then picks characters from that pool one at a time using random.choice() to build the final password.

⚠️ Note on Security

This project was built purely as a Python practice exercise, it is not intended for generating real, security-sensitive passwords.

It uses Python's built-in random module, which relies on a Mersenne Twister pseudo-random number generator (PRNG). This PRNG is fast and great for simulations, games, or general-purpose randomness, but it is not cryptographically secure: given enough observed output, it's possible to predict future values. That makes it unsuitable for anything where unpredictability actually matters, like passwords, tokens, or encryption keys.

For real-world password generation, use Python's secrets module instead. It's built specifically for security-sensitive tasks and draws from the OS's cryptographically secure random source. Example swap:

import secrets

password = "".join(secrets.choice(characters) for _ in range(length))

License

See LICENSE for details.