_realnumber.py 文件源码

def force_convert(self):
        if isinstance(self._value, float):
            return self.float_class(str(self._value))

        try:
            return self.float_class(self._value)
        except (TypeError, ValueError, decimal.InvalidOperation):
            raise TypeConversionError(
                "failed to force_convert to float: type={}".format(
                    type(self._value)))