python dict.item() 方法迭代字典

a = {'张无忌': 25, '赵敏': 24}
print(a.items())
print(type(a.items()))
 
for item in a.items():  # item对象由元组构成
    print(item)
    print(type(item))
 
for key, value in a.items():  # 元组由键值对构成
    print(key, value)
    print(type(key), type(value))