https://github.com/python/cpython/commit/84630e2cb90ef334e41eb9bccd860b3b0a7ff51b
commit: 84630e2cb90ef334e41eb9bccd860b3b0a7ff51b
branch: main
author: glennglazer <[email protected]>
committer: vsajip <[email protected]>
date: 2026-06-11T07:14:34+01:00
summary:
gh-136880: Add warning about PYTHONPATH (GH-151098)
files:
M Doc/tutorial/venv.rst
diff --git a/Doc/tutorial/venv.rst b/Doc/tutorial/venv.rst
index f362e1943b666f7..6b6b8a768e3f58d 100644
--- a/Doc/tutorial/venv.rst
+++ b/Doc/tutorial/venv.rst
@@ -88,6 +88,11 @@ For example:
'~/envs/tutorial-env/lib/python3.5/site-packages']
>>>
+Note that the activated virtual environment does not alter the ``PYTHONPATH``
variable in any way.
+This may lead to unexpected results if the path includes references to code
which is incompatible with
+the Python version the virtual environment is using. The best practice is to
``unset PYTHONPATH``
+in bash or the equivalent for the shell you are using.
+
To deactivate a virtual environment, type::
deactivate
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