Clarify rx parameter of compileall functions (#25857)
diff --git a/Doc/library/compileall.rst b/Doc/library/compileall.rst
index 5c6e68f..de34664 100644
--- a/Doc/library/compileall.rst
+++ b/Doc/library/compileall.rst
@@ -166,9 +166,10 @@
If *force* is true, modules are re-compiled even if the timestamps are up to
date.
- If *rx* is given, its search method is called on the complete path to each
+ If *rx* is given, its ``search`` method is called on the complete path to each
file considered for compilation, and if it returns a true value, the file
- is skipped.
+ is skipped. This can be used to exclude files matching a regular expression,
+ given as a :ref:`re.Pattern <re-objects>` object.
If *quiet* is ``False`` or ``0`` (the default), the filenames and other
information are printed to standard out. Set to ``1``, only errors are
@@ -242,9 +243,10 @@
cases where the source file does not exist at the time the byte-code file is
executed.
- If *rx* is given, its search method is passed the full path name to the
+ If *rx* is given, its ``search`` method is passed the full path name to the
file being compiled, and if it returns a true value, the file is not
- compiled and ``True`` is returned.
+ compiled and ``True`` is returned. This can be used to exclude files matching
+ a regular expression, given as a :ref:`re.Pattern <re-objects>` object.
If *quiet* is ``False`` or ``0`` (the default), the filenames and other
information are printed to standard out. Set to ``1``, only errors are
