python web service project structure

[PGSch]

Python Web Service Project Structure

This document outlines the initial structure for a Python web service repository, designed to be production-ready and containerized using Docker. The project setup includes a multi-stage Dockerfile, a requirements.txt file for dependencies, a .dockerignore file, an entrypoint script, and a README file with project details.

Project Structure

python-web-service/
├── Dockerfile
├── .dockerignore
├── requirements.txt
├── entrypoint.sh
├── README.md
└── src/
    └── app.py

Dockerfile

# Stage 1: Build stage
FROM python:3.9-slim as builder

# Set working directory and install build dependencies
WORKDIR /app
COPY requirements.txt .
RUN pip install --upgrade pip && pip install --no-cache-dir -r requirements.txt

# Stage 2: Final image
FROM python:3.9-slim
WORKDIR /app

# Copy only necessary files from the builder stage
COPY --from=builder /usr/local/lib/python3.9/site-packages /usr/local/lib/python3.9/site-packages
COPY . .

# Add entrypoint script and set permissions
COPY entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh

# Set the entrypoint
ENTRYPOINT ["/entrypoint.sh"]

# Define default command to run the application
CMD ["python", "src/app.py"]

.dockerignore

# Ignore Python cache and unnecessary directories
__pycache__/
*.pyc
*.pyo
*.pyd
.env

# Ignore version control and other sensitive files
.git
.gitignore
.DS_Store

requirements.txt

Flask==2.1.0
requests==2.27.1
gunicorn==20.1.0

entrypoint.sh

#!/bin/bash

# Log a start-up message
echo "Starting the Python web service..."

# Run database migrations or any other setup tasks here if needed
# e.g., python manage.py migrate

# Start the web server
exec "$@"

README.md

# Python Web Service

This repository contains a Python web service designed for deployment in a containerized environment. The service uses Flask and follows industry best practices for a production-ready application.

## Prerequisites
- Docker and Docker Compose installed
- Python 3.9+

## Getting Started
1. Clone the repository:
   ```bash
   git clone https://github.com/your-repo/python-web-service.git
   cd python-web-service

2. Build and run the Docker container:

   docker build -t python-web-service .
   docker run -p 5000:5000 python-web-service

3. Verify the service is running by visiting:

   http://localhost:5000/health
   

Directory Structure

• src/: Application code and main entry point (app.py).
• tests/: Test cases for the application.
• config/: Configuration files for different environments.

License

This project is licensed under the MIT License.

### src/app.py
```python
from flask import Flask, jsonify

app = Flask(__name__)

@app.route('/health', methods=['GET'])
def health_check():
    return jsonify({"status": "UP"}), 200

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5000)