multi_get_opt

    其中，MultiGetOptions可以指定sortkey的范围、是否包含边界、子串匹配、是否返回value、是否逆序等，具体定义如下：

    1. class MultiGetOptions(object):
    2.     """
    3.     configurable options for multi_get.
    4.     """
    6.         self.start_inclusive = True
    7.         self.stop_inclusive = False
    8.         self.sortkey_filter_type = filter_type.FT_NO_FILTER
    9.         self.sortkey_filter_pattern = ""
    12. class filter_type:
    13.   FT_NO_FILTER = 0
    14.   FT_MATCH_ANYWHERE = 1