selfteaching / selfteaching/selfteaching-python-camp
Day09 Counter的使用为什么要import collection？
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Description
看完参考材料，以为直接使用Counter对象就可以了，结果提示错误Undefined variable 'Counter'，就是未定义Counter，这时候则需要在顶部 加上import collections，为什么要加上import collections？如果不同的库有同样的两个对象，会出现不知道取哪个的情况。比如我们现在的stats_word模块中，有re 库 和collections库，假如它们都有一个名为Counter的对象，你直接使用Counter的时候，会出现不知道你是取re库的Counter对象还是取collections库的Counter对象。如果没有这样import collections这个语句，就不能使用collections里面的函数对象方法。这是我的一点理解，如果不对请大家指正。
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