使用itertools工具类中的chain方法,可以很方便的将多个iterable对象一起遍历. 不过,对于dict类型的iterable对象,只会遍历key.
from itertools import chain my_list = [1, 2, 3] my_dict = { ‘name‘: ‘zs‘, ‘age‘: 45 } # 使用chain将三个可迭代对象一起遍历, dict是打印key for value in chain(my_list, my_dict, range(20, 30)): print(value, end=",") # 1,2,3,name,age,20,21,22,23,24,25,26,27,28,29,
下面自定义一个my_chain,用于实现上面的功能
def my_chain(*args, **kwargs): """注意: args是一个tuple, tuple是一个可迭代对象""" for iterable_obj in args: for value in iterable_obj: yield value for value in my_chain(my_list, my_dict, range(20, 30)): print(value, end=",") # 1,2,3,name,age,20,21,22,23,24,25,26,27,28,29,
原文：https://www.cnblogs.com/z-qinfeng/p/12109749.html