replace @abstractproperty usage in mypy (#8310)

Author: TH3CHARLie

mypy/plugin.py

@@ -119,7 +119,7 @@ class C: pass
 semantic analyzer is enabled (it's always true in mypy 0.730 and later).
 """
 
-from abc import abstractmethod, abstractproperty
+from abc import abstractmethod
 from typing import Any, Callable, List, Tuple, Optional, NamedTuple, TypeVar, Dict
 from mypy_extensions import trait, mypyc_attr
 
@@ -214,7 +214,8 @@ class CheckerPluginInterface:
     path = None  # type: str
 
     # Type context for type inference
-    @abstractproperty
+    @property
+    @abstractmethod
     def type_context(self) -> List[Optional[Type]]:
         """Return the type context of the plugin"""
         raise NotImplementedError
@@ -348,7 +349,8 @@ def defer(self) -> None:
         """
         raise NotImplementedError
 
-    @abstractproperty
+    @property
+    @abstractmethod
     def final_iteration(self) -> bool:
         """Is this the final iteration of semantic analysis?"""
         raise NotImplementedError

mypy/semanal_shared.py

@@ -1,6 +1,6 @@
 """Shared definitions used by different parts of semantic analysis."""
 
-from abc import abstractmethod, abstractproperty
+from abc import abstractmethod
 
 from typing import Optional, List, Callable
 from typing_extensions import Final
@@ -67,7 +67,8 @@ def is_incomplete_namespace(self, fullname: str) -> bool:
         """Is a module or class namespace potentially missing some definitions?"""
         raise NotImplementedError
 
-    @abstractproperty
+    @property
+    @abstractmethod
     def final_iteration(self) -> bool:
         """Is this the final iteration of semantic analysis?"""
         raise NotImplementedError
@@ -156,7 +157,8 @@ def parse_bool(self, expr: Expression) -> Optional[bool]:
     def qualified_name(self, n: str) -> str:
         raise NotImplementedError
 
-    @abstractproperty
+    @property
+    @abstractmethod
     def is_typeshed_stub_file(self) -> bool:
         raise NotImplementedError