数据库中不包含怎么写

网站编辑2023-06-11 13:39:21310

在 Python 中,可以使用 dict 对象来存储数据。

```python class MySQL: def init(self, userid, username, addrcount, databasecount): self.userid = int(userid) self.username = string(username) self.addrcount = int(addrcount) self.databasecount = int(databasecount)

def insert(self, key, value):
    data = self.db_insert()
    data[key] = value
def update(self, key, value):
    self.db_update()
    if key in self.db_table:
        data[key] = value
    elif value > self.user_name:
        data[self.db_query(key, value)] = value
    else:
        data[key] = self.user_name
def delete(self, key):
    data = self.db_delete()
    if key in self.db_table:
        data[key] = null
    else:
        if self.user_id == key:
            self.db_delete(key)
       else:
           if self.user_id not in self.db_table:
               self.db_insert(key, self.user_id)
         else:
              self.db_delete(key)

class DatabaseLinkedList: def insert(self, key, value): # 要插入的位置和值 this.insertposition = [key] this.insertvalue = value

def update(self, key, value):
    # 要更新的位置和值
    # 要更新的值
    this.insert_position[key] = value
    this.insert_value = value
def delete(self, key):
    # 要删除的位置和值
    if key in self.db_table:
        if key == self.insert_position[key]:
            return self.delete_position[key]
     else:
          # 没有找到要删除的值
          return None

```

在 MySQL 中,