sqlalchemy多线程访问数据库
from sqlalchemy import Column, String, create_engine,Integer
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base
# 创建对象的基类:
Base = declarative_base()
# 定义User对象:
class Book(Base):
# 表的名字:
__tablename__ = 'novel_book'
# 表的结构:
id = Column(Integer, primary_key=True, autoincrement=True)
provide_name = Column(String(45))
start_url = Column(String(45))
state = Column(Integer)
# 初始化数据库连接:
engine = create_engine('mysql+pymysql://root:%s@localhost:3306/springboot' % sql_password,pool_size=10) # 有10个线程并发访问如果没有指定pool_size (默认是5)会有部分线程timeout 无法获取connection
# 创建DBSession类型:
DBSession = sessionmaker(bind=engine)