gh-92994: Clarify importlib "check" example (#92995)

Fixes #92994

diff --git a/Doc/library/importlib.rst b/Doc/library/importlib.rst
index f19532213940e253ae6471d6496dbd68e18abc9f..aac556e2c68d94024c252399d46b41da6ef0319b 100644 (file)
--- a/Doc/library/importlib.rst
+++ b/Doc/library/importlib.rst
@@ -1250,6 +1250,9 @@ Checking if a module can be imported
 
 If you need to find out if a module can be imported without actually doing the
 import, then you should use :func:`importlib.util.find_spec`.
+
+Note that if ``name`` is a submodule (contains a dot),
+:func:`importlib.util.find_spec` will import the parent module.
 ::
 
   import importlib.util