bpo-46239: improve error message when importing `asyncio.windows_even…

…ts` (GH-30353) (cherry picked from commit 5a2a650) Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
python · Jan 4, 2022 · 86d1b8c · 86d1b8c
1 parent 4affb99
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diff --git a/Lib/asyncio/windows_events.py b/Lib/asyncio/windows_events.py
@@ -1,5 +1,10 @@
 """Selector and proactor event loops for Windows."""
 
+import sys
+
+if sys.platform != 'win32':  # pragma: no cover
+    raise ImportError('win32 only')
+
 import _overlapped
 import _winapi
 import errno

diff --git a/Misc/NEWS.d/next/Library/2022-01-03-12-59-20.bpo-46239.ySVSEy.rst b/Misc/NEWS.d/next/Library/2022-01-03-12-59-20.bpo-46239.ySVSEy.rst
@@ -0,0 +1,2 @@
+Improve error message when importing :mod:`asyncio.windows_events` on
+non-Windows.