python 遍历的四种方法

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]))