monkeytype/trunk/py3.9.patch

   1 commit 6a60845958efffcec987ed1c6ce90e74cf7c8456
   2 Author: Felix Yan <felixonmars@archlinux.org>
   3 Date:   Sat Nov 21 05:50:14 2020 +0800
   4
   5     Fix compatibility with Python 3.9
   6
   7     Fixes #205, all tests are passing here.
   8
   9 diff --git a/monkeytype/compat.py b/monkeytype/compat.py
  10 index 01d5007..111d28e 100644
  11 --- a/monkeytype/compat.py
  12 +++ b/monkeytype/compat.py
  13 @@ -22,8 +22,16 @@ try:
  14      def is_union(typ: Any) -> bool:
  15          return typ is Union or is_generic(typ) and typ.__origin__ is Union
  16
  17 -    def is_generic(typ: Any) -> bool:
  18 -        return typ is Union or isinstance(typ, _GenericAlias)
  19 +    try:
  20 +        # Python 3.9
  21 +        from typing import _SpecialGenericAlias
  22 +
  23 +        def is_generic(typ: Any) -> bool:
  24 +            return typ is Union or isinstance(typ, _GenericAlias) or isinstance(typ, _SpecialGenericAlias)
  25 +
  26 +    except ImportError:
  27 +        def is_generic(typ: Any) -> bool:
  28 +            return typ is Union or isinstance(typ, _GenericAlias)
  29
  30      def is_generic_of(typ: Any, gen: Any) -> bool:
  31          return is_generic(typ) and typ.__origin__ is gen.__origin__