Redis
list
添加元素和删除元素只能在最后一个位置进行 -- 栈
添加元素只能在最后一个位置进行 删除元素只能在第一个位置进行 -- 队列
python操作Redis数据库
序列化 - 把对象转换成字节或者字符序列 - 串行化 / 腌咸菜 - serialize
反序列化 - 把字节或者字符序列还原成对象 - 反串行化 - deserialize
json模块 - 字符串形式（字符）的序列化和反序列化
- dumps: 将字典或者列表转换成json字符串
- loads: 将json字符串转换成字典或者列表
pickle模块 - 字节形式的序列化和反序列化
import pickle
import redis
class Student(object):
def __init__(self, name, age):
self.name = name
self.age = age
def main():
client = redis.StrictRedis(host='47.107.174.141',
password=123456)
client.set('username', 'hellokitty', 120)
print(client.ttl('username'))
print(client.get('username'))
print(client.expire('username', 300))
print(client.ttl('username'))
stu1 = Student('haha', 20)
# client.hset('stu', 'name', stu1.name)
# client.hset('stu', 'age', stu1.age)
client.set('stu', pickle.dumps(stu1))
if __name__ == '__main__':
main()
import pickle
import redis
class Student(object):
def __init__(self, name, age):
self.name = name
self.age = age
def main():
client = redis.StrictRedis(host='47.107.174.141',
password=123456)
stu = pickle.loads(client.get('stu'))
print(stu.name)
print(stu.age)
if __name__ == '__main__':
main()
base64编码数据、python连接Redis数据库进行存取
import base64
import redis
def main():
client = redis.StrictRedis(host='47.107.174.141',
password=123456)
with open('img/p1.jpg', 'rb') as f:
photo = base64.b64encode(f.read())
print(photo)
client.set('photo', photo)
if __name__ == '__main__':
main()
import base64
import redis
def main():
client = redis.StrictRedis(host='47.107.174.141',
password=123456)
photo = client.get('photo')
with open('img/p2.jpg', 'wb') as f:
f.write(base64.b64decode(photo))
if __name__ == '__main__':
main()
