fix type comparison

Author: alexfikl

sumpy/expansion/__init__.py

@@ -225,7 +225,7 @@ def __len__(self):
 
     def __eq__(self, other):
         return (
-                type(self) == type(other)
+                type(self) is type(other)
                 and self.kernel == other.kernel
                 and self.order == other.order
                 and self.use_rscale == other.use_rscale)

sumpy/expansion/local.py

@@ -70,7 +70,7 @@ def update_persistent_hash(self, key_hash, key_builder):
 
     def __eq__(self, other):
         return (
-            type(self) == type(other)
+            type(self) is type(other)
             and self.kernel == other.kernel
             and self.order == other.order
             and self.use_rscale == other.use_rscale

sumpy/kernel.py

@@ -102,9 +102,9 @@ def name(self):
     def __eq__(self, other):
         if id(self) == id(other):
             return True
-        if not type(self) == KernelArgument:
+        if type(self) is not KernelArgument:
             return NotImplemented
-        if not type(other) == KernelArgument:
+        if type(other) is not KernelArgument:
             return NotImplemented
         return self.loopy_arg == other.loopy_arg