(self, name)
return False
Determine if a column has an influence on ordering.

        Example::

            >>> x = OrderByTuple(('name', ))
            >>> 'name' in  x
            True
            >>> '-name' in x
            True

        Arguments:
            name (str): The name of a column. (optionally prefixed)

        Returns:
            bool: `True` if the column with `name` influences the ordering.
Determine if a column has an influence on ordering.
Determine if a column has an influence on ordering .
def __contains__(self, name):
        """
        Determine if a column has an influence on ordering.

        Example::

            >>> x = OrderByTuple(('name', ))
            >>> 'name' in  x
            True
            >>> '-name' in x
            True

        Arguments:
            name (str): The name of a column. (optionally prefixed)

        Returns:
            bool: `True` if the column with `name` influences the ordering.
        """
        name = OrderBy(name).bare
        for order_by in self:
            if order_by.bare == name:
                return True
        return False
def __contains__ ( self , name ) : name = OrderBy ( name ) . bare for order_by in self : if order_by . bare == name : return True return False