标签:color ble 筛选 结果 iterable pre 元素 class 原来
filter
1. 执行了filter之后的结果集合一定<= 执行之前的个数
2. filter 只管筛选,不会改变原来的值
filter(function or None, iterable)
map
1. 执行前后元素个数不变
2. 值可能发生改变
map(func, *iterables)
标签:color ble 筛选 结果 iterable pre 元素 class 原来
原文地址:https://www.cnblogs.com/Hxx0916/p/9561308.html