diff -r 70d42e2ad9b4 -r 9ce76155e0da mercurial/utils/compression.py
--- a/mercurial/utils/compression.py	Wed Nov 06 17:46:26 2019 -0500
+++ b/mercurial/utils/compression.py	Wed Nov 06 14:20:27 2019 -0500
@@ -646,7 +646,7 @@
         # Not all installs have the zstd module available. So defer importing
         # until first access.
         try:
-            from .. import zstd
+            from .. import zstd  # pytype: disable=import-error
 
             # Force delayed import.
             zstd.__version__