python字典遍历

#字典遍历
a = {'a': '1', 'b': '2', 'c': '3'}
#遍历key
for i in a:
    print(i)
for i in a.keys():
    print(i)

#遍历value
for i in a.values():
    print(i)

#遍历组员
for i in a.items():
    print(i)
for key,value in a.items():
    print(key,value)