def _convert_to_python(self, valueDict, state):
        v = valueDict.copy()
        try:
            field = v.pop(self.name)
        except __HOLE__:
            raise Invalid(
                self.message('missing', state, name=repr(self.name)),
                valueDict, state)
        return field, v
dataset/ETHPy150Open formencode/formencode/formencode/validators.py/StripField._convert_to_python