persistent.py 文件源码

def values(self):
            """Set-like object providing a view of index values.

            >>> index = Index('/tmp/diskcache/index')
            >>> index.clear()
            >>> index.update({'a': 1, 'b': 2, 'c': 3})
            >>> values_view = index.values()
            >>> 2 in values_view
            True

            :return: values view

            """
            return ValuesView(self)