# Prepare your module here

# NOTE: You can redesign the class as you see fit!

# Import necessary libraries

class Collaborative:
    def __init__(self, data):
        self.data = data

    def preprocessing_data(self):
        # Your code here
        pass

    def fit(self):
        # Your code here
        pass

    def evaluate(self):
        # Your code here
        pass

    def save_model(self):
        # Your code here
        pass

    def recommend(self, user_id: int):
        # Your code here
        pass

    def get_similar_users(self, user_id: int):
        # Your code here
        pass