python学习笔记11：字典的循环

info = {
    'stu1101':"TengLan Wu",
    'stu1102':"LongZe LuoLa",
    'stu1103':"XiaoZe MaLiya",
}
# 循环打印key
for i in info:
    print(i)

打印结果：
stu1101
stu1102
stu1103

# 循环打印key 和其value--------最优循环
info = {
    'stu1101':"TengLan Wu",
    'stu1102':"LongZe LuoLa",
    'stu1103':"XiaoZe MaLiya",
}
for i in info:
    print(i,info[i])

打印结果：
stu1101 TengLan Wu
stu1102 LongZe LuoLa
stu1103 XiaoZe MaLiya

# 循环打印key 和其value，items是列表，此时，说明，有一步操作是将字典转成了列表，数据量大，转换过程将特别慢
info = {
    'stu1101':"TengLan Wu",
    'stu1102':"LongZe LuoLa",
    'stu1103':"XiaoZe MaLiya",
}
for k,v in info.items():
    print(k,v)

打印结果：
stu1101 TengLan Wu
stu1102 LongZe LuoLa
stu1103 XiaoZe MaLiya