(self)
return Columns(self.domain)
A class whose attributes contain attribute descriptors for columns.
        For a table `table`, setting `c = table.columns` will allow accessing
        the table's variables with, for instance `c.gender`, `c.age` ets.
        Spaces are replaced with underscores.
A class whose attributes contain attribute descriptors for columns.
        For a table `table`, setting `c = table.columns` will allow accessing
        the table's variables with, for instance `c.gender`, `c.age` ets.
        Spaces are replaced with underscores.
A class whose attributes contain attribute descriptors for columns . For a table table setting c = table . columns will allow accessing the table s variables with for instance c . gender c . age ets . Spaces are replaced with underscores .
def columns(self):
        """
        A class whose attributes contain attribute descriptors for columns.
        For a table `table`, setting `c = table.columns` will allow accessing
        the table's variables with, for instance `c.gender`, `c.age` ets.
        Spaces are replaced with underscores.
        """
        return Columns(self.domain)
def columns ( self ) : return Columns ( self . domain )