#字典dict
a = {'tom':'湯姆','mike':'麥克','peter':'彼德'}
#印出keys鍵
for i in a.keys():
    print(i)
    
#印出values值
for i in a.values():
    print(i)
    
#印出鍵值(keys,values)
for i,v in a.items():
    print(i,v)