Convert the value to a real python object

def to_python(self, value, context=None):
        """Convert the value to a real python object"""
        value = value.copy()
        res = {}
        errors = []
        for field, schema in self._fields.items():
            name = schema.get_attr('name', field)
            if name in value:
                try:
                    res[field] = schema.to_python(
                        value.pop(name),
                        context=context
                    )
                except exceptions.ValidationErrors as ex:
                    self._update_errors_by_exception(errors, ex, name)
        self._raise_exception_when_errors(errors, value)
        res.update(value)
        return res