Dicts of native values <- Dicts of primitive datatypes.

def to_internal_value(self, data):
        """
        Dicts of native values <- Dicts of primitive datatypes.
        """
        if html.is_html_input(data):
            data = html.parse_html_dict(data)
        if not isinstance(data, dict):
            self.fail('not_a_dict', input_type=type(data).__name__)
        return {
            six.text_type(key): self.child.run_validation(value)
            for key, value in data.items()
        }