用python写一个企业差旅费报销程序，并输出费用超标部分

在Python中编写一个简单的差旅费报销程序，我们可以假设有以下几个类：员工、部门和公司，每个类都有相关的属性如姓名、职位、部门等。这里我们仅创建一个基础版本的报销处理逻辑，用于计算并输出超标部分。

class Employee:
    def __init__(self, name, position, department, expenses):
        self.name = name
        self.position = position
        self.department = department
        self.expenses = expenses

class Department:
    def __init__(self, name, daily_expense_limit):
        self.name = name
        self.daily_expense_limit = daily_expense_limit

class Company:
    def __init__(self, departments):
        self.departments = departments

    def calculate_excess(self):
        for dept in self.departments:
            total_expenses = sum(employee.expenses for employee in dept.employee_list)
            if total_expenses > dept.daily_expense_limit:
                excess_amount = total_expenses - dept.daily_expense_limit
                print(f"{dept.name}部门超额金额：{excess_amount}")

# 示例数据
emp1 = Employee("张三", "经理", Department("销售部", 5000), [3000, 2500])
emp2 = Employee("李四", "职员", Department("市场部", 4000), [1800, 2000])
department_list = [Department("销售部", 5000), Department("市场部", 4000)]
company = Company(department_list)

# 计算和输出超标部分
company.calculate_excess()

在这个例子中，`calculate_excess`方法遍历各部门员工的总花费，如果超过每日限制，就打印出超出的部分。请注意这只是一个简化版的示例，实际的企业报销系统会更复杂，包括用户输入验证、审批流程等。