Makes people smile



Generic badge Generic badge Generic badge ForTheBadge uses-git

Business Problem

Problem Description

Netflix is all about connecting people to the movies they love. To help customers find those movies, they developed world-class movie recommendation system: CinematchSM. Its job is to predict whether someone will enjoy a movie based on how much they liked or disliked other movies. Netflix use those predictions to make personal movie recommendations based on each customer’s unique tastes. And while Cinematch is doing pretty well, it can always be made better.

Now there are a lot of interesting alternative approaches to how Cinematch works that netflix haven’t tried. Some are described in the literature, some aren’t. We’re curious whether any of these can beat Cinematch by making better predictions. Because, frankly, if there is a much better approach it could make a big difference to our customers and our business.


The goal of this project is to develop a recomendation system #DataScience for Netflix.

GitHub repo size GitHub code size in bytesGitHub top language

#DataScience #Netflix #Recommendation System

#Ratings #Movie PRediction #Numpy-Pandas


Netflix provided a lot of anonymous rating data, and a prediction accuracy bar that is 10% better than what Cinematch can do on the same training data set. (Accuracy is a measurement of how closely predicted ratings of movies match subsequent actual ratings.)

About the Project

  1. Predict the rating that a user would give to a movie that he ahs not yet rated.
  2. Minimize the difference between predicted and actual rating (RMSE and MAPE)

Steps involved in this project

Made with Python Made with love ForTheBadge built-with-swag

  1. Some form of interpretability.
  2. Machine Learning Problem
  3. Data

    Data Overview

    Get the data from :

Data files :

  • combined_data_1.txt
  • combined_data_2.txt
  • combined_data_3.txt
  • combined_data_4.txt
  • movie_titles.csv

The first line of each file [combined_data_1.txt, combined_data_2.txt, combined_data_3.txt, combined_data_4.txt] contains the movie id followed by a colon. Each subsequent line in the file corresponds to a rating from a customer and its date in the following format:


MovieIDs range from 1 to 17770 sequentially. CustomerIDs range from 1 to 2649429, with gaps. There are 480189 users. Ratings are on a five star (integral) scale from 1 to 5. Dates have the format YYYY-MM-DD.

# Movie by Movie Similarity Matrix
start =
if not os.path.isfile('m_m_sim_sparse.npz'):
    print("It seems you don't have that file. Computing movie_movie similarity...")
    start =
    m_m_sim_sparse = cosine_similarity(X=train_sparse_matrix.T, dense_output=False)
    # store this sparse matrix in disk before using it. For future purposes.
    print("Saving it to disk without the need of re-computing it again.. ")
    sparse.save_npz("m_m_sim_sparse.npz", m_m_sim_sparse)
    print("It is there, We will get it.")
    m_m_sim_sparse = sparse.load_npz("m_m_sim_sparse.npz")
    print("Done ...")

print("It's a ",m_m_sim_sparse.shape," dimensional matrix")

print( - start)

Mapping the real world problem to a Machine Learning Problem

Type of Machine Learning Problem

Libraries Used

Ipynb Ipynb Ipynb Ipynb Ipynb Ipynb Ipynb


  • Install datetime using pip command: from datetime import datetime
  • Install pandas using pip command: import pandas as pd
  • Install numpy using pip command: import numpy as np
  • Install matplotlib using pip command: import matplotlib
  • Install matplotlib.pyplot using pip command: import matplotlib.pyplot as plt
  • Install seaborn using pip command: import seaborn as sns
  • Install os using pip command: import os
  • Install scipy using pip command: from scipy import sparse
  • Install scipy.sparse using pip command: from scipy.sparse import csr_matrix
  • Install sklearn.decomposition using pip command: from sklearn.decomposition import TruncatedSVD
  • Install sklearn.metrics.pairwise using pip command: from sklearn.metrics.pairwise import cosine_similarity
  • Install random using pip command: import random

How to run?


knn_bsl_u         1.0726493739667242
knn_bsl_m          1.072758832653683
svdpp             1.0728491944183447
bsl_algo          1.0730330260516174
xgb_knn_bsl_mu    1.0753229281412784
xgb_all_models     1.075480663561971
first_algo        1.0761851474385373
xgb_bsl           1.0763419061709816
xgb_final         1.0763580984894978
xgb_knn_bsl       1.0763602465199797
Name: rmse, dtype: object

Project Reports


IPYNB GitHub top language

Report - A Detailed Report on the Analysis


PRs Welcome GitHub issues GitHub pull requests GitHub commit activity

  • Clone this repository:
git clone

Need help?

Facebook Instagram LinkedIn

:email: Feel free to contact me @ [email protected]

GMAIL Twitter Follow


MIT © Sivasubramanian

GitHub license GitHub forks GitHub stars GitHub followers Ask Me Anything !

Movie Recommendation Netflix

🔮Trying to find the best movie to watch on Netflix can be a daunting. Case Study for Recommendation System of movies in Netflix.🔧

Movie Recommendation Netflix Info

⭐ Stars 32
🔗 Homepage
🔗 Source Code
🕒 Last Update 8 months ago
🕒 Created 2 years ago
🐞 Open Issues 1
➗ Star-Issue Ratio 32
😎 Author storieswithsiva