Make FooConverter inherit from ConversionInterface in examples

dstansby · dstansby · commit a82753ef3a11 · 2018-09-26T13:06:28.000+01:00
diff --git a/examples/units/evans_test.py b/examples/units/evans_test.py
@@ -27,7 +27,7 @@ def value(self, unit):
         return self._val / unit
 
 
-class FooConverter(object):
+class FooConverter(units.ConversionInterface):
     @staticmethod
     def axisinfo(unit, axis):
         'return the Foo AxisInfo'
