Pylama is a code audit tool for Python and JavaScript to check for style, syntax and other code health metrics. It is essentially a convenient wrapper above tools such as Pyflakes, pydocstyle, pycodestyle and McCabe, among others.

autopep8 automatically formats Python code to conform to the PEP 8 style guide. It uses the pycodestyle utility to determine what parts of the code needs to be formatted. autopep8 is capable of fixing most of the formatting issues that can be reported by pycodestyle.

This package lets you set a different time for your tests.

This package provides a plugin to test Python click interfaces with pytest.

This is a py.test plugin that enables you to set environment variables in the pytest.ini file.

This package provides Pytest extension which disables all network calls flowing through Python's socket interface

This package provides a pytest fixture for testing flake8 plugins.

icontract brings design-by-contract to Python with informative violation messages and inheritance. icontract provides two function, require and ensure for preconditions and postconditions respectively. Additionally, it provides a class decorator, invariant, to establish class invariants.

This package provides a pytest plugin to re-run tests to eliminate flaky failures.

Vulture finds unused code in Python programs. This is useful for cleaning up and finding errors in large code bases. If you run Vulture on both your library and test suite you can find untested code. Due to Python's dynamic nature, static code analyzers like Vulture are likely to miss some dead code. Also, code that is only called implicitly may be reported as unused.

Data-Driven Tests (DDT) allow you to multiply one test case by running it with different test data, and make it appear as multiple test cases.

crosshair is an analysis tool for Python that works by repeatedly calling your functions with symbolic inputs. It uses an SMT solver explore viable execution paths and find counterexamples for you.

This package implements a functionality to save an SVG screenshot of a running Textual app to disk. The next time the test runs, it takes another screenshot and compares it to the saved one. If the new screenshot differs from the old one, the test fails. This is a convenient way to quickly and automatically detect visual regressions in your applications.

Bandit is a tool designed to find common security issues in Python code. To do this Bandit processes each file, builds an AST from it, and runs appropriate plugins against the AST nodes. Once Bandit has finished scanning all the files it generates a report.

Gcovr provides a utility for managing the use of the GNU gcov utility and generating summarized code coverage results. It is inspired by the Python coverage.py package, which provides a similar utility for Python.

green is a Python test runner that describes itself as:

Clean

Low redundancy in output. Result statistics for each test is vertically aligned.

Colorful

Terminal output makes good use of color when the terminal supports it.

Fast

Tests run in independent processes (one per processor by default).

Powerful

Multi-target and auto-discovery support.

Traditional

It uses the normal unittest classes and methods.

Descriptive

Multiple verbosity levels, from just dots to full docstring output.

Convenient

Bash-completion and ZSH-completion of options and test targets.

Thorough

Built-in integration with coverage.

This is a plugin to facilitate image comparison for Matplotlib figures in Pytest.

This package provides a Pytest extension for sharding tests at the granularity of individual test cases, which can be run in parallel and on multiple machines.

This package provides a collection of utility functions and classes which make writing and running functional and integration tests easier.

This package implements a functionality to share a state / intermediate results across test steps.

This package provides a simple assertion library for unit testing in Python with a fluent API.

nox is a command-line tool that automates testing in multiple Python environments, similar to tox. Unlike tox, Nox uses a standard Python file for configuration.

This package provides a flake8 extension to lint for newline after class definitions.

Aioresponses is a helper to mock/fake web requests in python aiohttp package. For requests module there are a lot of packages that help us with testing (eg. httpretty, responses, requests-mock). When it comes to testing asynchronous HTTP requests it is a bit harder (at least at the beginning). The purpose of this package is to provide an easy way to test asynchronous HTTP requests.