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Description:

pytestisrunning 1.5.1

pytest plugin providing a function to check if pytest is running.

Unmaintained (2024-01-02)
I stopped maintaining this package as it doesn’t provide much value over checking whether pytest has been imported:
import sys

if "pytest" in sys.modules:
...
In every project I’ve seen, pytest is only imported when running.

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Installation
Install with:
python -m pip install pytest-is-running
Python 3.8 to 3.12 supported.

Usage
pytest will automatically find the plugin and use it when you run pytest.
You can check if pytest is running with the is_running() function:
import pytest_is_running

if pytest_is_running.is_running():
...
The package avoids importing pytest if it is not running, so that you don’t incur that overhead in non-test paths.
The package registers its plugin hooks as early as possible in pytest’s process, so it should be loaded before any of your non-test modules.

Rationale
This plugin is an alternative to re-implementing the pattern in the pytest documentation.
As a plugin, it is loaded earlier than conftest.py or any other code in your project.
This makes it a more robust way of checking whether pytest is currently running.
Upstream issue #9502 discusses adding a feature to pytest.
It also covers an alternative which is often “good enough” - a simple check if pytest has been imported with:
"pytest" in sys.modules
This won’t be strictly accurate if you happen to import pytest outside of your test run, but that is not very common.
You may prefer to using this simpler technique instead of this plugin.