Passing Parameters in aiohttp Requests

Feb 22, 2024 ยท 2 min read

When making requests with the Python aiohttp library, you'll often need to send parameters along with the request. Parameters allow you to pass data to the server to modify the response.

There are a few ways to add parameters to an aiohttp request:

Query String Parameters

The most common way to pass parameters is through the request URL's query string. For example:

import aiohttp

async with aiohttp.ClientSession() as session:
    async with session.get('') as resp:
        print(await resp.text())

Here key and limit are query parameters that are appended to the URL with a ? and joined with a &.

Request Data as Form Parameters

You can also pass data in the request body as form parameters:

data = {'key': 'xyz', 'limit': 10}
async with'', data=data) as resp:
    print(await resp.text())

aiohttp will automatically encode the data as form parameters.


For APIs that accept JSON, you can pass a python dict which aiohttp will encode as JSON:

data = {'key': 'xyz', 'limit': 10} 
async with'', json=data) as resp:
    print(await resp.text())

The main options for passing parameters are through the query string, form data, or JSON body. Choose the appropriate approach based on what the API expects.

Passing parameters allows you to fully leverage the power of APIs in your aiohttp application!

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