Reverted suggested changes

theano/compile/ops.py

@@ -509,7 +509,7 @@ class FromFunctionOp(gof.Op):
             self.infer_shape = self._infer_shape
 
     def __eq__(self, other):
-        return (isinstance(self, type(other)) and
+        return (type(self) == type(other) and
                 self.__fn == other.__fn)
 
     def __hash__(self):

theano/gof/op.py

@@ -835,7 +835,7 @@ class Op(utils.object2, PureOp, CLinkerOp):
 
     def __eq__(self, other):
         if hasattr(self, '__props__'):
-            return (isinstance(self, type(other))
+            return (type(self) == type(other)
                     and self._props() == other._props())
         else:
             return NotImplemented

theano/gof/tests/test_op.py

@@ -29,7 +29,7 @@ class MyType(Type):
         self.thingy = thingy
 
     def __eq__(self, other):
-        return isinstance(other, type(self)) and other.thingy == self.thingy
+        return type(other) == type(self) and other.thingy == self.thingy
 
     def __str__(self):
         return str(self.thingy)