python 遍历的四种方法

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dic1 = {'date':'2018.11.2','name':'carlber','work':"遍历",'number':3} for i in dic1:   #遍历字典中的键     print(i)   for key in dic1.keys():     print(key)   for value in dic1.values():  #遍历字典中的值     print(value)   for item in dic1.items():  #遍历字典中的元素     print(item)   for i in dic1:     print("该次循环得到的key为%s，得到的值为%s"%(i,dic1[i]))