}
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=1,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
re.sadd("set_name","aa","bb")
re.sadd("set_name1","bb","cc")
re.sadd("set_name2","bb","cc","dd")
print(re.sdiff("set_name","set_name1","set_name2")) # 输出存在 set_name 中但是不存在 set_name1 和 set_name2 中的元素
# 结果如下
{'aa'}
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=1,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
re.sadd("set_name","aa","bb")
re.sadd("set_name1","bb","cc")
re.sadd("set_name2","bb","cc","dd")
print(re.sinter("set_name","set_name1","set_name2")) # 输出 set_name,set_name1 和 set_name2 的交集
# 结果如下
{'bb'}
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=1,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
re.sadd("set_name","aa","bb")
re.sadd("set_name1","bb","cc")
re.sadd("set_name2","bb","cc","dd")
print(re.sunion("set_name","set_name1","set_name2")) # 获取 set_name,set_name1,set_name2 的并集
# 结果如下
{'bb', 'cc', 'aa', 'dd'}
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=1,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
print(re.sismember("Animal","cat")) # 判断 cat 存在于集合 Animal 中
# 结果如下
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=1,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
re.smove("set_name1","set_name","cc") # 将 set_name1 中的 cc 移动到 set_name 中
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=1,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
print(re.smembers("Animal"))
print(re.spop("Animal")) # 移除某个值(无序删除)
print(re.smembers("Animal"))
# 结果如下
{'dog', 'cat', 'pig'}
{'dog', 'pig'}
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=1,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
print(re.smembers("Animal"))
re.srem("Animal","cat") # 指定删除 Animal 集合中的 cat 元素
print(re.smembers("Animal"))
# 结果如下
{'dog', 'cat', 'pig'}
{'dog', 'pig'}
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=1,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
print(re.smembers("Animal"))
re.srem("Animal","cat","pig") # 指定删除 Animal 集合中的 cat 和 pig 元素
print(re.smembers("Animal"))
# 结果如下
{'pig', 'cat', 'dog'}
{'dog'}
Zset 操作
有序集合:在集合的基础上,为每元素排序,元素的排序需要根据另外一个值来进行比较
对于有序集合,每一个元素有两个值,即:值和分数,分数专门用来做排序
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=2,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
re.zadd("Animal",{"cat":1,"dog":2,"pig":3}) # 往有序集合 Animal 中加入元素值和其对应的分数
zrange( name,start,end,desc=False,withscores=False,score_cast_func=int) 按照索引范围 [start,end] 获取 name 对应的有序集合的元素
name:redis 的 name
start:有序集合索引起始位置
end:有序集合索引结束位置
desc:排序规则,默认按照分数从小到大排序
False:按分数从小到大排序
True:按分数从大到小排序
withscores:是否获取元素的分数,默认只获取元素的值
False:只获取元素值
True:获取元素值和分数
score_cast_func:对分数进行数据转换的函数
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=2,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
print(re.zrange("Animal",0,2)) # 获取 Animal 有序集合中索引范围为 [0,2] 所对应的值
# 结果如下
['cat', 'dog', 'pig']
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=2,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
print(re.zrange("Animal",0,2,desc=True,withscores=True)) # 获取 Animal 有序集合中索引范围为 [0,2] 所对应的值
# 结果如下
[('pig', 3.0), ('dog', 2.0), ('cat', 1.0)]
zrevrange(name,start,end,withscores=False,score_cast_func=float) 按照索引范围 [start,end] 获取 name 对应的有序集合的元素
用法同 zrange()
默认按分数从大到小排序的
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=2,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
print(re.zrevrange("Animal",0,2,withscores=True)) # 获取 Animal 有序集合中索引范围为 [0,2] 所对应的值
# 结果如下
[('pig', 3.0), ('dog', 2.0), ('cat', 1.0)]
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=2,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
print(re.zrange("Animal",0,5,withscores=True))
print(int(re.zscore("Animal","pig"))) # 获取 Animal 对应有序集合中 pig 对应的分数
# 结果如下
[('cat', 1.0), ('dog', 2.0), ('pig', 3.0)]
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=2,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
print(re.zcard("Animal"))
# 结果如下
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=2,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
print(re.zcount("Animal",2,3)) # 获取有序集合 Animal 中分数在 [2,3] 之间的元素数量
# 结果如下
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=2,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
print(re.zrange("Animal",0,5))
print(re.zrank("Animal","cat")) # 获取 cat 在 Animal 对应的有序集合中的排行位置,从 0 开始(按照分数从小到大排序)
print(re.zrevrank("Animal","cat")) # 获取 cat 在 Animal 对应的有序集合中的排行位置,从 0 开始(按照分数从大到小排序)
# 结果如下
['cat', 'dog', 'pig']
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=2,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
print(re.zrange("Animal",0,5,withscores=True))
re.zrem("Animal","dog","cat") # 删除 Animal 对应的有序集合中值是 dog 和 cat 的成员
print(re.zrange("Animal",0,5,withscores=True))
# 结果如下
[('cat', 1.0), ('dog', 2.0), ('pig', 3.0)]
[('pig', 3.0)]
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=2,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
print(re.zrange("Animal",0,5,withscores=True))
re.zremrangebyrank("Animal",0,2) # 删除 Animal 对应的有序集合中排行索引值 [0,2] 范围的元素
print(re.zrange("Animal",0,5,withscores=True))
# 结果如下
[('cat', 1.0), ('dog', 2.0), ('pig', 3.0)]
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=2,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
print(re.zrange("Animal",0,5,withscores=True))
re.zremrangebyscore("Animal",0,2) # 删除 Animal 对应的有序集合中分数等于 0 或者 2 的元素
# re.zremrangebyscore("Animal",2,2) # 删除 Animal 对应的有序集合中分数等于 2 的元素
print(re.zrange("Animal",0,5,withscores=True))
# 结果如下
[('cat', 1.0), ('dog', 2.0), ('pig', 3.0)]
[('cat', 1.0)]
# [('cat', 1.0), ('pig', 3.0)]
delete(*names) 根据 name 删除 redis 中的任意数据类型
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=0,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
re.delete("Student2","Fruits") # 删除 db0 中 Student2 和 Fruits 数据
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=0,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
re.delete("Student2","Fruits") # 删除 db0 中 Student2 和 Fruits 数据
print(re.exists("Student2")) # 判断在 db0 中 Student2 是否存在
print(re.exists("Student1"))
# 结果如下
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=0,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
re.rename("Student1","Student") # 将 Student1 重命名为 Student
print(re.get("Student"))
# 结果如下
zhaoliu
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=0,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
re.move("Student",4) # 将 Student 从 db0 移动到 db4 中
import redis
pool = redis.ConnectionPool(host="192.168.0.221",port=6379,db=0,password="123456",decode_responses=True)
re = redis.Redis(connection_pool=pool)
print(re.type("Student"))
print(re.type("Teacher"))
# 结果如下
string