Fix type annotations

Author: miedzinski

mypy/semanal.py

@@ -2160,7 +2160,7 @@ def build_typeddict_typeinfo(self, name: str, items: List[str],
 
         return info
 
-    def check_classvar_definition(self, s: AssignmentStmt):
+    def check_classvar_definition(self, s: AssignmentStmt) -> None:
         if isinstance(s.type, ClassVarType) and not self.is_class_scope():
             self.fail("Invalid ClassVar definition", s)
 

mypy/types.py

@@ -1207,7 +1207,7 @@ def serialize(self) -> JsonDict:
         return {'.class': 'ClassVarType', 'item': self.item.serialize()}
 
     @classmethod
-    def deserialize(cls, data: JsonDict) -> 'TypeType':
+    def deserialize(cls, data: JsonDict) -> 'ClassVarType':
         assert data['.class'] == 'ClassVarType'
         return ClassVarType(Type.deserialize(data['item']))
 
@@ -1539,7 +1539,7 @@ def visit_ellipsis_type(self, t: EllipsisType) -> str:
     def visit_type_type(self, t: TypeType) -> str:
         return 'Type[{}]'.format(t.item.accept(self))
 
-    def visit_classvar_type(self, t: TypeType) -> str:
+    def visit_classvar_type(self, t: ClassVarType) -> str:
         return 'ClassVar[{}]'.format(t.item.accept(self))
 
     def list_str(self, a: List[Type]) -> str: