import aiohttp modulenotfounderror: no module named 'aiohttp'

Feb 22, 2024 ยท 2 min read

When working with Python, you may encounter an error like:

import aiohttp
ModuleNotFoundError: No module named 'aiohttp'

This happens when you try to import a module that Python cannot locate on your system. In this case, Python is looking for the aiohttp module but not finding it installed.

There are a couple ways to fix this:

Install the Missing Module

The easiest solution is to install the missing aiohttp module. You can install aiohttp using pip:

pip install aiohttp

This will download and install aiohttp so it is available for importing.

Make sure you are running the pip command for the same Python environment you are trying to import aiohttp in. If using virtual environments, activate the venv first before running the pip install.

Add Module Install Location to PYTHONPATH

Another option is that aiohttp is installed, but Python just doesn't know where to find it.

You can add the directory containing aiohttp to your PYTHONPATH environment variable. This tells Python additional places to search when importing modules.

For example:

export PYTHONPATH="${PYTHONPATH}:/mymodules"

Just add the path containing your installed copy of aiohttp.

Reinstall the Module

Sometimes a module is installed but becomes corrupted or unusable. If you previously had aiohttp working, try fully reinstalling the module:

pip uninstall aiohttp
pip install aiohttp

This will fetch a fresh copy which can help resolve issues.

The key things to check when facing import errors are that:

  1. The module is actually installed for your environment
  2. Python knows where to search to find the module
  3. The module installation is not corrupted

Following these steps should help you successfully import aiohttp without any errors!

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