执行查询对象

Question

具有一个从SQLAlchemy返回Query对象的函数，我该如何执行它？我试图在各个函数中创建查询，然后根据输入内容在main方法中执行

例如

def get_plan_query():
    return session.query(Plan.name).filter(Plan.id==2)

def get_plan_query_2():
    return session.query(Plan.name).filter(Plan.author == 'clark')

def download_data():
    pd.read_sql(session.query(union(get_plan_query(), get_plan_query_2()).statement, session.bind) # <- This does not work