web.py 文件源码

def aparam():
    """Use in a SQL string to make a spot for a db value."""
    style = ctx.db_module.paramstyle
    if style == 'qmark':
        return '?'
    elif style == 'numeric':
        return ':1'
    elif style in ['format', 'pyformat']:
        return '%s'
    raise UnknownParamstyle, style