如何在python中从sql数据库中的一列中找到多个数字的和？

from sqlalchemy import create_engine, Column, Integer
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base

# 创建数据库连接
engine = create_engine('数据库连接字符串')
Session = sessionmaker(bind=engine)
session = Session()

# 创建映射类
Base = declarative_base()

class MyTable(Base):
    __tablename__ = '表名'
    id = Column(Integer, primary_key=True)
    number = Column(Integer)

# 查询并计算和
result = session.query(MyTable.number).all()
numbers = [row[0] for row in result]
total_sum = sum(numbers)

print("和:", total_sum)