Lesson 9.4: Introduction to APIs (Optional for Advanced Learners)
Introduction:
APIs (Application Programming Interfaces) allow Python programs to communicate with other software, services, or web applications. This lesson introduces the basics of APIs, making HTTP requests, and handling responses using Python.
1. What is an API?
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API is a set of rules that allows two applications to interact
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Web APIs often use HTTP methods like GET, POST, PUT, DELETE
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Data is usually exchanged in JSON format
2. Making API Requests with Python:
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Use the
requestslibrary to interact with APIs
Installation:
Example – GET Request:
Example – POST Request:
3. Handling API Responses:
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Check status codes: 200 (OK), 404 (Not Found), 500 (Server Error)
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Use
.json()to convert JSON response to Python dictionary -
Handle exceptions using
try-except
4. Practical Tips:
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Always read API documentation before using it
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Respect rate limits to avoid being blocked
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Use APIs for data retrieval, automation, and integration in Python projects
Learning Outcome of This Lesson:
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Understand what APIs are and how they work
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Make GET and POST requests using Python
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Handle JSON responses and errors
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Integrate APIs into Python projects for real-world applications
