Disaster Response Pipeline Project

• Table of Contents
  • Introduction
  • Installation
  • File Descriptions
  • Instructions
  • Screenshots
  • Acknowledgements

Introduction

During disaster events, sending messages to appropriate disaster relief agencies on a timely manner is critical. Using natural language processing and machine learning, I built a model for an API that classifies disaster messages and also a webapp for emergency works.

• First, I developed an ETL pipeline that can:
  • Loads the messages and categories datasets
  • Merges the two datasets
  • Cleans the data
  • Stores it in a SQLite database
• Then, I created a machine learning pipeline that can:
  • Loads data from the SQLite database
  • Splits the dataset into training and test sets
  • Builds a text processing and machine learning pipeline
  • Trains and tunes a model using GridSearchCV
  • Outputs results on the test set
  • Exports the final model as a pickle file
• Finally, A WEB APP where an emergency worker can input a new message and get classification results in several categories was developed. The web app also displays visualizations of the data.

Installation

The code was developed using the Anaconda distribution of Python, versions 3.8.1. Python libraries used are numpy, pandas, sqlalchemy, plotly, sklearn, nltk, pickle, utility, flask, wordcloud

File Descriptions

In the Project Workspace, you’ll find a data set containing real messages that were sent during disaster events.

• app
  • templates
    • master.html - main page of web app
    • go.html - classification result page of web app
  • utility.py - customized transformers and functions
  • run.py - Flask file that runs app
• data
  • disaster_categories.csv - data to process
  • disaster_messages.csv - data to process
  • ETL_Pipeline_Preparation.ipynb - notebook to explore the datasets and prepare ETL pipeline
  • process_data.py - ETL pipeline to clean and store data into a SQLite database
  • DisasterResponse.db - database to save clean data to
• models
  • train_classifier.py - Use ML pipeline to train and save the trained model in a pickle file
  • classifier.pkl - saved model
  • ML_Pipeline_Preparation.ipynb - notebook to try ML models and prepare ML pipeline
  • utility.py - customized transformers and functions
• README.md

Instructions:

1. Run the following commands in the project’s root directory to set up your database and model.

   • To run ETL pipeline that cleans data and stores in database
     python data/process_data.py data/disaster_messages.csv data/disaster_categories.csv data/DisasterResponse.db

   • To run ML pipeline that trains classifier and saves
     python models/train_classifier.py data/DisasterResponse.db models/classifier.pkl

2. Run the following command in the app’s directory to run your web app.
   python run.py

3. Go to http://0.0.0.0:3001/

4. The webapp files are in the webapp branch
   The web app is at webapp homepage

Screenshots

1. Home Page

2. Message Categories

Acknowledgements

Special thanks to Figure Eight for providing the dataset.