🎬 Simple Movie Recommender (CLI)

This is a very simple command-line movie recommender written in Python.
It stores users and their favorite movies in a JSON file (users.json) and recommends movies to a user based on the most similar existing user.

📁 Project Structure

simple-movie-recommender/
├── recommender.py # main script (CLI)
├── users.json # users and their favorite movies (created/updated at runtime)
└── README.md

🧠 How it works

1. The program asks for your name.
2. If you already exist in users.json, it loads your favorite movies.
3. If you are a new user, it asks you to enter 2 or 3 favorite movies and saves them.
4. Then it finds the user with the most shared movies with you.
5. Finally, it recommends the movies that the matched user likes but you haven't watched yet.

🧪 Recommendation Logic

• Users are stored as:

  {
    "Ali": ["Inception", "Matrix"],
    "Sara": ["Titanic", "Inception"]
  }

• Similarity is computed by set intersection of movie titles (case-insensitive).
• If multiple users have the same similarity score, the one with lexicographically smaller name is chosen.

▶️ Run

python recommender.py

Then follow the prompts in the terminal.

🗄 Data Persistence

• If users.json exists → it loads it.
• If it does not exist → it uses default users defined in the code and will create the file after first new user is added.

🛠 Requirements

• Python 3.8+
• No external libraries (only json, pathlib, time from stdlib)