定义一个员工类：包含如下内容，属性：姓名，工号，身份证，工资，工龄，毕业学校

以下是员工类的定义，包含姓名、工号、身份证、工资、工龄、毕业学校等属性：

class Employee:
    def __init__(self, name, id_num, salary, seniority, school):
        self.name = name
        self.id_num = id_num
        self.salary = salary
        self.seniority = seniority
        self.school = school

    def get_name(self):
        return self.name

    def get_id_num(self):
        return self.id_num

    def get_salary(self):
        return self.salary

    def get_seniority(self):
        return self.seniority

    def get_school(self):
        return self.school

    def set_salary(self, new_salary):
        self.salary = new_salary

    def set_seniority(self, new_seniority):
        self.seniority = new_seniority

    def set_school(self, new_school):
        self.school = new_school

以上是一个简单的员工类定义，其中包含了构造函数和一些获取和设置属性的方法。可以根据实际需要进行修改和扩展。