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"""
        vals = []
        for k,v in kw.iteritems():
            vals.append('%s=%s' %(k,self._conv(v)))
        return vals