from sqlalchemy import create_engine
from sqlalchemy.orm import declarative_base,sessionmaker

db_url = 'mysql+pymysql://root:123456@192.168.5.12:3306/team?charset=utf8mb4'
engine = create_engine(db_url,pool_size=50)
Base = declarative_base()

Session = sessionmaker(bind=engine,autoflush=False,autocommit=False)

def get_db():
    db = Session()
    try:
        yield db
    finally:
        db.close()