boto.compat, base64: fix version handling of (en|de)codebytes (#4070)

Co-authored-by: hauntsaninja <>

third_party/2and3/boto/compat.pyi

@@ -1,7 +1,10 @@
 import sys
 
 from typing import Any
-from base64 import encodestring as encodebytes
+if sys.version_info >= (3,):
+    from base64 import encodebytes as encodebytes
+else:
+    from base64 import encodestring as encodebytes
 
 from six.moves import http_client