def is_show_uncategorized(self, request):
        """Return the result of the "?show_uncategorized" query string param"""

        show_uncategorized = request.GET.get('show_uncategorized', False)
        if show_uncategorized is True or show_uncategorized == 'true':
            return True
        return False
def serialize(self, value, display=False):
        if value is True:
            return "true"
        elif value in (False, None):
            return "false"
        else:
            raise ValueError(f"{value!r} is not a boolean")