目录1.基本使用2.声明的同时一起初始化3.判断key是否存在4.遍历map5.删除k-v对6.map是无序的，如何让其按照指定的顺序遍历map7.map作为元素存储到切片中8.切片作为map的value，map的key为字符串9.map作为map的value1
How would one extend the Paginat开发者_如何学Pythonor class in django.core.paginator to work with Google App Engine queries?The following changes are necessary:
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