What is a RESTful API?

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To connect a Python application to a database, you typically use a database connector or library that provides a bridge between Python and the specific type of database (e.g., MySQL, PostgreSQL, SQLite, MongoDB, etc.).

A RESTful API is an application programming interface (API) that follows the principles of REST (Representational State Transfer), an architectural style for designing web services. It defines how clients (like browsers, mobile apps, or other servers) interact with a server over HTTP in a consistent and stateless way.

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🔑 Key Characteristics of RESTful APIs:

1. Stateless

   • Each request from the client must contain all the necessary information (like authentication and data). The server does not store client session state.

2. Client–Server Separation

   • The frontend (client) and backend (server) are independent. The client handles UI, while the server handles logic and data.

3. Uniform Interface

   • REST uses standard HTTP methods:

     • GET → Retrieve data

     • POST → Create data

     • PUT/PATCH → Update data

     • DELETE → Remove data

4. Resources and URIs

   • Data is treated as resources (like users, products, or orders), each identified by a URL.

   • Example:

     • GET /api/users → fetch all users

     • GET /api/users/1 → fetch user with ID 1

5. Representation

   • Resources are usually represented in JSON (sometimes XML or others).

6. Stateless Communication

   • Every request is independent; the server does not rely on previous requests.

7. Cacheable

   • Responses can be cached to improve performance.

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✅ Example

If you have a books API:

• GET /books → returns a list of books

• GET /books/10 → returns details of book with ID 10

• POST /books → adds a new book

• PUT /books/10 → updates book with ID 10

• DELETE /books/10 → removes book with ID 10

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👉 In short:
A RESTful API is a structured way of exposing data and functionality over the web using HTTP, making it easy for different systems to communicate.

Would you like me to also explain the difference between REST and GraphQL for a deeper comparison?

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