diff -upr selectors2-2.0.2.orig/selectors2.py selectors2-2.0.2/selectors2.py
--- selectors2-2.0.2.orig/selectors2.py	2020-07-22 01:37:48.000000000 +0300
+++ selectors2-2.0.2/selectors2.py	2021-12-04 00:57:54.254560632 +0200
@@ -22,7 +22,8 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-from collections import namedtuple, Mapping
+from collections import namedtuple
+from collections.abc import Mapping
 import errno
 import math
 import platform