python-aiohttpHow to set headers in Python Aiohttp?

Headers can be set in Python Aiohttp using the add_headers method. This method takes a dictionary of headers as an argument.

import aiohttp

headers = {
    'User-Agent': 'My User Agent 1.0',
    'From': '[email protected]'
}

async with aiohttp.ClientSession() as session:
    async with session.get('https://www.example.com', headers=headers) as resp:
        print(resp.status)
        print(resp.headers)

Output example

200
{'Content-Type': 'text/html; charset=UTF-8', 'Content-Length': '1256', 'Connection': 'close', 'Date': 'Sun, 21 Jun 2020 11:45:45 GMT', 'Server': 'Apache', 'Last-Modified': 'Wed, 09 Jul 2003 23:32:50 GMT', 'ETag': '"3f80f-1b6-3e1cb03b"', 'Accept-Ranges': 'bytes', 'User-Agent': 'My User Agent 1.0', 'From': '[email protected]'}

Code explanation

1. import aiohttp - imports the aiohttp library
2. headers = {...} - creates a dictionary of headers
3. async with aiohttp.ClientSession() as session - creates a client session
4. async with session.get('https://www.example.com', headers=headers) as resp - sends a GET request to the specified URL with the headers
5. print(resp.status) - prints the response status
6. print(resp.headers) - prints the response headers

Helpful links

• aiohttp Documentation
• HTTP Headers

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