code: def pop(self, pair, default=None):
          
          return super(BaseKerning, self).pop(pair, default)
docs: Removes the **pair** from the Kerning and returns the value as an ``int``.
          If no pair is found, **default** is returned. **pair** is a
          ``tuple`` of two :ref:`type-string`\s. This must return either
  
          **default** or a :ref:`type-int-float`.
  
              >>> font.kerning.pop(("A", "V"))
              -20
              >>> font.kerning.pop(("A", "W"))
              -10.5