好的,为您封装一个缓存数据库数据的类,以下是示例代码:
class CacheDatabase:
def __init__(self):
self.cache = {}
def fetch_data(self, key):
if key in self.cache:
return self.cache[key]
else:
# fetch data from database
data = self.fetch_from_database(key)
# cache data
self.cache[key] = data
return data
def fetch_from_database(self, key):
# code to retrieve data from database
pass
def update_data(self, key, value):
# update data in database
self.update_database(key, value)
# update cache
self.cache[key] = value
def update_database(self, key, value):
# code to update data in database
pass
def delete_data(self, key):
# delete data from database
self.delete_from_database(key)
# delete from cache
del self.cache[key]
def delete_from_database(self, key):
# code to delete data from database
pass
请问还有什么问题我能帮到您?
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