Requests: A Library for Simplifying HTTP Requests for Web Scraping and API Calls

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1. Sending a Simple GET Request

import requests

# Define the URL for the request
url = 'https://jsonplaceholder.typicode.com/posts/1'
# Send a GET request
response = requests.get(url)

# Check the response status code
if response.status_code == 200:
    # Print the JSON data from the response
    print(response.json())
else:
    print(f"Request failed, status code: {response.status_code}")

Knowledge Summary:

requests.get() is used to send an HTTP GET request.
response.status_code retrieves the response status code, where 200 indicates a successful request.
response.json() is used to parse the response content into JSON format, suitable for cases where the response is JSON data.

2. GET Request with Query Parameters

import requests

# Define the URL for the request
url = 'https://jsonplaceholder.typicode.com/posts'
# Define query parameters
params = {
    'userId': 1
}
# Send a GET request with query parameters
response = requests.get(url, params=params)

if response.status_code == 200:
    print(response.json())
else:
    print(f"Request failed, status code: {response.status_code}")

Knowledge Summary:

By using the params parameter, you can add query parameters to the GET request, and requests will automatically encode them into the URL.
Query parameters are commonly used for filtering, pagination, etc., making it easier to retrieve specific data from the server.

3. Sending a POST Request

import requests

# Define the URL for the request
url = 'https://jsonplaceholder.typicode.com/posts'
# Define the request body data
data = {
    'title': 'foo',
    'body': 'bar',
    'userId': 1
}
# Send a POST request
response = requests.post(url, json=data)

if response.status_code == 201:
    print(response.json())
else:
    print(f"Request failed, status code: {response.status_code}")

Knowledge Summary:

requests.post() is used to send an HTTP POST request.
json parameter is used to pass JSON formatted request body data, and requests will automatically set the request header’s Content-Type to application/json.
Status code 201 typically indicates that the resource was created successfully.

4. Sending a PUT Request

import requests

# Define the URL for the request
url = 'https://jsonplaceholder.typicode.com/posts/1'
# Define the request body data
data = {
    'title': 'updated title',
    'body': 'updated body',
    'userId': 1
}
# Send a PUT request
response = requests.put(url, json=data)

if response.status_code == 200:
    print(response.json())
else:
    print(f"Request failed, status code: {response.status_code}")

Knowledge Summary:

requests.put() is used to send an HTTP PUT request, typically for updating resources on the server.
Similar to POST requests, the request body data is passed using the json parameter.

5. Sending a DELETE Request

import requests

# Define the URL for the request
url = 'https://jsonplaceholder.typicode.com/posts/1'
# Send a DELETE request
response = requests.delete(url)

if response.status_code == 200:
    print("Resource deleted successfully")
else:
    print(f"Request failed, status code: {response.status_code}")

Knowledge Summary:

requests.delete() is used to send an HTTP DELETE request to remove resources from the server.
Typically, DELETE requests do not require a request body, only the URL of the resource to be deleted needs to be specified.

Summary of Knowledge Points and Code Features

Knowledge Point	Description	Code Features
Sending Requests	Use the `<span>requests</span>` library’s `<span>get()</span>`, `<span>post()</span>`, `<span>put()</span>`, `<span>delete()</span>` methods to send different types of HTTP requests	Method names are intuitive and easy to use
Status Code Check	Check the response status of the request using `<span>response.status_code</span>`	Convenient for determining if the request was successful
Data Transmission	Use the `<span>params</span>` parameter to pass query parameters, and `<span>json</span>` parameter to pass JSON formatted request body data	Automatically handles data encoding and request header settings
Response Handling	`<span>response.json()</span>` is used to parse the JSON formatted response content	Simplifies the data processing process

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Requests: A Library for Simplifying HTTP Requests for Web Scraping and API Calls

1. Sending a Simple GET Request

2. GET Request with Query Parameters

3. Sending a POST Request

4. Sending a PUT Request

5. Sending a DELETE Request

Summary of Knowledge Points and Code Features

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