用python写一个管理系统

好的，管理系统有很多种类型，我来给你写一个简单的员工信息管理系统。

首先，我们需要定义一个员工类 Employee，包含员工的姓名、工号、职位、入职时间等基本信息。代码如下：

class Employee:
    def __init__(self, name, employee_id, position, hire_date):
        self.name = name
        self.employee_id = employee_id
        self.position = position
        self.hire_date = hire_date

接下来，我们需要一个员工信息管理系统类，包含添加员工、删除员工、修改员工信息、查询员工信息等功能。代码如下：

class EmployeeSystem:
    def __init__(self):
        self.employees = []

    # 添加员工
    def add_employee(self, employee):
        self.employees.append(employee)

    # 删除员工
    def remove_employee(self, employee_id):
        for employee in self.employees:
            if employee.employee_id == employee_id:
                self.employees.remove(employee)
                return True
        return False

    # 修改员工信息
    def update_employee(self, employee_id, new_employee):
        for i, employee in enumerate(self.employees):
            if employee.employee_id == employee_id:
                self.employees[i] = new_employee
                return True
        return False

    # 查询员工信息
    def get_employee(self, employee_id):
        for employee in self.employees:
            if employee.employee_id == employee_id:
                return employee
        return None

最后，我们可以写一个简单的测试程序来验证上述代码的正确性。代码如下：

if __name__ == '__main__':
    system = EmployeeSystem()

    # 添加员工
    employee1 = Employee('张三', '001', '经理', '2021-01-01')
    system.add_employee(employee1)

    # 查询员工信息
    employee = system.get_employee('001')
    print(employee.name, employee.employee_id, employee.position, employee.hire_date)

    # 修改员工信息
    employee2 = Employee('李四', '001', '副经理', '2021-02-01')
    system.update_employee('001', employee2)
    employee = system.get_employee('001')
    print(employee.name, employee.employee_id, employee.position, employee.hire_date)

    # 删除员工
    system.remove_employee('001')
    employee = system.get_employee('001')
    if employee is None:
        print('员工已删除')

以上代码实现了一个简单的员工信息管理系统，你可以根据需要进行修改和扩展。