如何使用sqlalchemy对avg进行计数？

from sqlalchemy import create_engine, func
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base

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

Base = declarative_base()

class YourModel(Base):
    __tablename__ = 'your_table_name'
    id = Column(Integer, primary_key=True)
    value = Column(Float)

avg_value = session.query(func.avg(YourModel.value)).scalar()

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

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

Base = declarative_base()

class YourModel(Base):
    __tablename__ = 'your_table_name'
    id = Column(Integer, primary_key=True)
    value = Column(Float)

avg_value = session.query(func.avg(YourModel.value)).scalar()
print(avg_value)