small fix

Author: matthiasdiener

pytools/__init__.py

@@ -485,6 +485,8 @@ def __setstate__(self, valuedict: Dict[str, Any]) -> None:
     def __eq__(self, other: Any) -> bool:
         if self is other:
             return True
+        if not isinstance(other, Record):
+            return False
         return (self.__class__ == other.__class__
                 and self.__getstate__() == other.__getstate__())
 
@@ -505,8 +507,8 @@ def __hash__(self) -> int:
                 (type(self),) + tuple(getattr(self, field)
                     for field in self.__class__.fields))
 
-        assert self._cached_hash
-        return self._cached_hash
+        from typing import cast
+        return cast(int, self._cached_hash)
 
 
 class ImmutableRecord(ImmutableRecordWithoutPickling, Record):