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asyncio powered HTTP client for bravado

Project description PyPi version Supported Python versions


Note: This is not a fork or reimplementation of bravado using asynchronous programming (like aiomysql is for PyMySQL). The interface of bravado remains unchanged. If you’re developing fully asynchronous applications, you should use aiobravado instead.

bravado-asyncio is an asynchronous HTTP client for the bravado library. It uses Python’s asyncio and aiohttp internally. It enables you to do concurrent network requests with bravado, similar to the fido client. Unlike fido, bravado-asyncio does not depend on crochet or twisted and uses Python 3’s standard library to implement asynchronous behavior.

aiobravado, the fully asynchronous version of bravado, uses bravado-asyncio internally as HTTP client.

Example usage

If you’re familiar with bravado then all you need to do is switch out (or specify) your HTTP client:

from bravado_asyncio.http_client import AsyncioClient
from bravado.client import SwaggerClient

client = SwaggerClient.from_url(
pet =


# This will install bravado-asyncio and bravado
$ pip install bravado-asyncio

# To install bravado-asyncio with the optional cchardet and aiodns packages,
# which are recommended by the underlying aiohttp package
$ pip install bravado-asyncio[aiohttp_extras]

Project status

The project is successfully used in production at Yelp. We have an integration test suite that not only covers bravado-asyncio behavior, but also makes sure that behavior is equal to the (default) synchronous bravado HTTP client. That said, if you find a bug please file an issue!

Development and contributing

Developing bravado-asyncio requires a working installation of Python 3.6 with the virtualenv package being installed. All other requirements will be installed in a virtualenv created in the venv directory. We also expect make to be installed. If you do not have it and do not want to install it then please refer to the Makefile as to what commands need to be run for each target.

  1. Run make. This will create the virtualenv you will use for development, with all runtime and development dependencies installed.

  2. If you’re using aactivator then you will be prompted to activate the new environment, please do so. If you prefer not to use aactivator, do source

  3. Make sure everything is set up correctly by running make test.

Since make test will run tests with multiple Python versions, you’ll get an error if one of them can’t be found. You can ask tox to run tests with a specific Python version like so:

$ tox -e py38

This will run tests with Python 3.8.

We do run linters that currently require Python 3.6. You can run them with tox -e pre-commit.

Travis (the continuous integration system) and Github Actions will run tests with all supported Python versions, on all supported platforms (Linux, macOS, Windows). Make sure you don’t write code that works only on certain platforms or Python versions.

Great, you’re ready to go! If you have an improvement or bugfix, please submit a pull request.

The event loop

bravado-asyncio creates its own event loop in a separate thread. This is necessary as it is not possible to use the main event loop - it would require a fork of bravado, making its public interface asynchronous. That said, bravado-asyncio and bravado should work well with your existing asyncio application.

You shouldn’t normally need to interact with bravado-asyncio’s event loop. If you do need to do so please use bravado_asyncio.http_client.get_loop() to retrieve it. Note that it won’t be the currently active loop!


Written by Stephan Jaensch and licensed under the BSD 3-clause license (see LICENSE.txt).

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