docs: update tox python version from 3.9 to 3.12 in dev env

prathamhole14 · prathamhole14 · commit 2f48a730ed32 · 2026-05-29T13:55:32.000+05:30
diff --git a/doc/source/dev/development_environment.rst b/doc/source/dev/development_environment.rst
@@ -177,9 +177,9 @@ That also takes extra arguments, like ``--pdb`` which drops you into the Python
 debugger when a test fails or an exception is raised.
 
 Running tests with `tox`_ is also supported.  For example, to build NumPy and
-run the test suite with Python 3.9, use::
+run the test suite with Python 3.12, use::
 
-    $ tox -e py39
+    $ tox -e py312
 
 For more extensive information, see :ref:`testing-guidelines`.
 
