Working with APIs (Application Programming Interfaces) means allowing different software systems to communicate with each other.<\/p>\n\n\n\n
APIs enable applications to send requests and receive responses, usually in JSON format.<\/p>\n\n\n\n
Example:<\/p>\n\n\n\n
A weather app uses an API to get live weather data from a server.<\/p>\n\n\n\n
An API is a bridge between two systems.<\/p>\n\n\n\n
Client \u2192 Sends request
Server \u2192 Processes request
Server \u2192 Sends response<\/p>\n\n\n\n
Most modern APIs use:<\/p>\n\n\n\n
HTTP protocol
JSON data format<\/p>\n\n\n\n
Example API response (JSON):<\/p>\n\n\n\n
{
“name”: “Ali”,
“age”: 25
}<\/p>\n\n\n\n
GET \u2192 Retrieve data
POST \u2192 Create new data
PUT \u2192 Update existing data
PATCH \u2192 Partially update data
DELETE \u2192 Remove data<\/p>\n\n\n\n
These are used when interacting with REST APIs.<\/p>\n\n\n\n
An endpoint is a specific URL where API requests are sent.<\/p>\n\n\n\n
Example:<\/p>\n\n\n\n
GET \/users
POST \/users
GET \/users\/1<\/p>\n\n\n\n
Each endpoint performs a specific function.<\/p>\n\n\n\n
You can use the requests library.<\/p>\n\n\n\n
Install:<\/p>\n\n\n\n
pip install requests<\/p>\n\n\n\n
Example:<\/p>\n\n\n\n
import requestsresponse = requests.get(\"https:\/\/api.example.com\/users\")data = response.json()print(data)<\/pre>\n\n\n\nSending Data Using POST<\/h2>\n\n\n\n
import requestsdata = {
\"name\": \"Ali\",
\"age\": 25
}response = requests.post(\"https:\/\/api.example.com\/users\", json=data)print(response.json())<\/pre>\n\n\n\nHandling API Responses<\/h2>\n\n\n\n
Important response properties:<\/p>\n\n\n\n
response.status_code \u2192 HTTP status
response.json() \u2192 Get JSON data
response.text \u2192 Raw text<\/p>\n\n\n\nCommon Status Codes:<\/p>\n\n\n\n
200 \u2192 Success
201 \u2192 Created
400 \u2192 Bad request
401 \u2192 Unauthorized
404 \u2192 Not found
500 \u2192 Server error<\/p>\n\n\n\nAuthentication in APIs<\/h2>\n\n\n\n
Many APIs require authentication.<\/p>\n\n\n\n
Common methods:<\/p>\n\n\n\n
API Key
Token Authentication
JWT
OAuth<\/p>\n\n\n\nExample with token:<\/p>\n\n\n\n
headers = {
\"Authorization\": \"Token your_token_here\"
}response = requests.get(\"https:\/\/api.example.com\/data\", headers=headers)<\/pre>\n\n\n\nError Handling<\/h2>\n\n\n\n
Always handle errors:<\/p>\n\n\n\n
if response.status_code == 200:
print(response.json())
else:
print(\"Error:\", response.status_code)<\/pre>\n\n\n\nReal-World Uses of APIs<\/h2>\n\n\n\n
Payment gateways
Weather apps
Social media integrations
AI services
Database services
Cloud platforms<\/p>\n\n\n\nAPIs power modern web and mobile applications.<\/p>\n\n\n\n
Best Practices When Working with APIs<\/h2>\n\n\n\n
Check documentation
Handle errors properly
Secure your API keys
Use HTTPS
Validate responses
Respect rate limits<\/p>\n\n\n\nKey Takeaway<\/h2>\n\n\n\n
Working with APIs allows applications to communicate and exchange data efficiently.<\/p>\n\n\n\n
Understanding HTTP methods, endpoints, authentication, and JSON handling is essential for modern backend and frontend development.<\/p>\n\n\n