Make a list of strings to pass to an SQL statement
        from the dictionary kw with Python types

def _make_sql_params(self,kw):
        """Make a list of strings to pass to an SQL statement
        from the dictionary kw with Python types"""
        return ['%s=?' %k for k in kw.keys() ]
        for k,v in kw.iteritems():
            vals.append('%s=?' %k)
        return vals