bilby/gw/prior.py: Fix the equality check of UniformInComponentsMassRatio

bilby/gw/prior.py

@@ -313,6 +313,21 @@ class UniformInComponentsChirpMass(PowerLaw):
             name=name, latex_label=latex_label, unit=unit, boundary=boundary)
 
 
+class WrappedInterp1d(interp1d):
+    """ A wrapper around scipy interp1d which sets equality-by-instantiation """
+    def __eq__(self, other):
+
+        for key in self.__dict__:
+            if type(self.__dict__[key]) is np.ndarray:
+                if not np.array_equal(self.__dict__[key], other.__dict__[key]):
+                    return False
+            elif key == "_spline":
+                pass
+            elif getattr(self, key) != getattr(other, key):
+                return False
+        return True
+
+
 class UniformInComponentsMassRatio(Prior):
 
     def __init__(self, minimum, maximum, name='mass_ratio', latex_label='$q$',
@@ -339,8 +354,9 @@ class UniformInComponentsMassRatio(Prior):
             latex_label=latex_label, unit=unit, boundary=boundary)
         self.norm = self._integral(maximum) - self._integral(minimum)
         qs = np.linspace(minimum, maximum, 1000)
-        self.icdf = interp1d(self.cdf(qs), qs, kind='cubic',
-                             bounds_error=False, fill_value=(minimum, maximum))
+        self.icdf = WrappedInterp1d(
+            self.cdf(qs), qs, kind='cubic',
+            bounds_error=False, fill_value=(minimum, maximum))
 
     @staticmethod
     def _integral(q):