How to Install `yarl` in Python

v1.23.0 Web & HTTP Python >=3.10 Apache-2.0

Yet another URL library

Install pip install yarl

What is yarl?

Yet another URL library

The module provides handy URL class for URL parsing and changing.

All url parts: scheme, user, password, host, port, path, query and fragment are accessible by properties:

All url manipulations produce a new url object:

Documentation → PyPI page → Author: Andrew Svetlov

Quick Start

Minimal example to get started with yarl:

import yarl

print(yarl.__version__)

Installation

pip (standard)

pip install yarl

Virtual environment (recommended)

python -m venv venv
source venv/bin/activate   # Windows: venv\Scripts\activate
pip install yarl

pip3

pip3 install yarl

conda

conda install -c conda-forge yarl

Poetry

poetry add yarl

Dependencies

Installing yarl will also install these packages:

idna multidict propcache

Verify the Installation

After installing, confirm the package is available:

python -c "import yarl; print(yarl.__version__)"

If this prints a version number, installation succeeded. If you see a ModuleNotFoundError, see the errors section below.

Installation Errors

Common errors when installing yarl with pip.

ModuleNotFoundError: No module named 'yarl'

Cause: The package is not installed in the current Python environment.

Fix: Run pip install yarl. If using a virtual environment, ensure it is activated first.

ModuleNotFoundError: No module named 'yarl' (installed but still failing)

Cause: pip installed the package into a different Python than the one running your script.

Fix: Use python -m pip install yarl to install into the interpreter you are running.

ImportError: cannot import name 'X' from 'yarl'

Cause: The function or class does not exist in the installed version.

Fix: Check the version with pip show yarl and upgrade with pip install --upgrade yarl.

pip: command not found

Cause: pip is not in PATH or Python was not added to PATH during installation.

Fix: Try python -m pip install yarl. On macOS/Linux try pip3.

PermissionError: [Errno 13] Permission denied

Cause: No write access to the system Python package directory.

Fix: Use a virtual environment, or add --user: pip install --user yarl

SSL: CERTIFICATE_VERIFY_FAILED

Cause: pip cannot verify PyPI's SSL certificate — common behind corporate proxies.

Fix: Try: pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org yarl

ConnectionError: Failed to establish a new connection

Cause: Server unreachable, URL invalid, or firewall/proxy blocking the connection.

Fix: Verify the URL and network access. Set HTTP_PROXY / HTTPS_PROXY env vars if behind a proxy.

SSLError: CERTIFICATE_VERIFY_FAILED

Cause: The remote server's SSL certificate cannot be verified.

Fix: Update CA certificates on your system. For testing only, disable SSL verification (never in production).

Recent Releases

Version	Released
`1.23.0` latest	2026-03-01
`1.22.0`	2025-10-06
`1.21.0`	2025-10-05
`1.20.1`	2025-06-10
`1.20.0`	2025-04-17

Full release history on PyPI →

Manage yarl

Upgrade to latest version

pip install --upgrade yarl

Install a specific version

pip install yarl==1.23.0

Uninstall

pip uninstall yarl

Check what is installed

pip show yarl

Last updated: 2026-04-11 • Data from PyPI

How to Install yarl in Python