元组(tuple)
元祖为不可被修改的列表,不可变类型
基本操作:
索引
切片
循环
长度
包含
以下为详细介绍 ~
count 查找元素个数
user_tuple = ('xmzncc','asd','fcc')
v = user_tuple.count('xmzncc')
print(v)
index 获取元祖中第一个元素的索引位置
user_tuple = ('xmzncc','asd','fcc','xmzncc')
v = user_tuple.index('xmzncc')
print(0)
字典(dict)
get 根据key值去对应的value
取不到值返回None,不报错
dic = {'k1':'v1','k2':'v2'}
v = dic.get('k1')
print(v)
clear 清空
dic = {'k1':'v1','k2':'v2'}
v = dic.clear()
print(dic)
copy 拷贝(浅拷贝)
dic = {'k1':'v1','k2':'v2'}
v = dic.copy()
print(dic)
pop 删除并获取对应的value值
dic = {'k1':'v1','k2':'v2'}
v = dic.pop('k1')
print(dic)
print(v)
popitem 随机删除键值对,并获取到删除的键值
dic = {'k1':'v1','k2':'v2'}
v = dic.popitem()
print(v)
print(dic)
setdefault 增加,如果key值存在则不操作
dic = {'k1':'v1','k2':'v2'}
dic.setdefault('k3','v3')
print(dic)
update 批量增加或修改
dic = {'k1':'v1','k2':'v2'}
dic.update({'k3':'v3','k4':'v4'})
print(dic)