day2-字典循环

user = {
    'xiaoming':'123',
    'xiaobai':'111',
    'xiaowang':'222'
}
# 直接循环字典，每次取到值的值是key
for i in user:
   print("%s ==> %s" % (i,user.get(i)))

for k,v in user.items():
    print("%s ==> %s" % (k,v))