用python实现 GUI版的员工薪资管理系统，具有如下功能： 1）员工的信息输入，（包括属性：工号，姓名，基本工资，绩效，扣款） 2）显示员工信息（包括属性：工号，姓名，基本工资，绩效，扣款，实发金额（=基本工资+绩效-扣款）） 3）按员工实发工资降序排序。 4）可以将数据保存到txt文件中。

好的，以下是一个Python实现的员工薪资管理系统，具有上述功能：

import tkinter as tk
from tkinter import messagebox
import operator

class Employee:
    def __init__(self, id, name, salary, performance, deduction):
        self.id = id
        self.name = name
        self.salary = salary
        self.performance = performance
        self.deduction = deduction
        self.net_salary = salary + performance - deduction

class EmployeeManagementSystem:
    def __init__(self):
        self.employees = []
        self.root = tk.Tk()
        self.root.title("员工薪资管理系统")
        self.root.geometry("600x400")

        # 创建标签和输入框
        tk.Label(self.root, text="工号").grid(row=0, column=0)
        self.id_entry = tk.Entry(self.root)
        self.id_entry.grid(row=0, column=1)

        tk.Label(self.root, text="姓名").grid(row=1, column=0)
        self.name_entry = tk.Entry(self.root)
        self.name_entry.grid(row=1, column=1)

        tk.Label(self.root, text="基本工资").grid(row=2, column=0)
        self.salary_entry = tk.Entry(self.root)
        self.salary_entry.grid(row=2, column=1)

        tk.Label(self.root, text="绩效").grid(row=3, column=0)
        self.performance_entry = tk.Entry(self.root)
        self.performance_entry.grid(row=3, column=1)

        tk.Label(self.root, text="扣款").grid(row=4, column=0)
        self.deduction_entry = tk.Entry(self.root)
        self.deduction_entry.grid(row=4, column=1)

        # 创建按钮
        tk.Button(self.root, text="添加员工", command=self.add_employee).grid(row=5, column=0)
        tk.Button(self.root, text="显示员工信息", command=self.show_employee).grid(row=5, column=1)
        tk.Button(self.root, text="员工信息排序", command=self.sort_employee).grid(row=5, column=2)
        tk.Button(self.root, text="保存到txt文件", command=self.save_to_file).grid(row=5, column=3)

    def add_employee(self):
        # 从输入框中获取员工信息
        id = self.id_entry.get()
        name = self.name_entry.get()
        salary = float(self.salary_entry.get())
        performance = float(self.performance_entry.get())
        deduction = float(self.deduction_entry.get())

        # 创建员工对象并添加到员工列表中
        employee = Employee(id, name, salary, performance, deduction)
        self.employees.append(employee)

        # 清空输入框
        self.id_entry.delete(0, tk.END)
        self.name_entry.delete(0, tk.END)
        self.salary_entry.delete(0, tk.END)
        self.performance_entry.delete(0, tk.END)
        self.deduction_entry.delete(0, tk.END)

        messagebox.showinfo("添加员工", "员工添加成功！")

    def show_employee(self):
        # 创建新窗口显示员工信息
        top = tk.Toplevel()
        top.title("员工信息")
        top.geometry("400x300")

        # 创建表格
        tk.Label(top, text="工号").grid(row=0, column=0)
        tk.Label(top, text="姓名").grid(row=0, column=1)
        tk.Label(top, text="基本工资").grid(row=0, column=2)
        tk.Label(top, text="绩效").grid(row=0, column=3)
        tk.Label(top, text="扣款").grid(row=0, column=4)
        tk.Label(top, text="实发金额").grid(row=0, column=5)

        # 显示员工信息
        for i in range(len(self.employees)):
            tk.Label(top, text=self.employees[i].id).grid(row=i+1, column=0)
            tk.Label(top, text=self.employees[i].name).grid(row=i+1, column=1)
            tk.Label(top, text=self.employees[i].salary).grid(row=i+1, column=2)
            tk.Label(top, text=self.employees[i].performance).grid(row=i+1, column=3)
            tk.Label(top, text=self.employees[i].deduction).grid(row=i+1, column=4)
            tk.Label(top, text=self.employees[i].net_salary).grid(row=i+1, column=5)

    def sort_employee(self):
        # 按照实发金额降序排序
        self.employees.sort(key=operator.attrgetter("net_salary"), reverse=True)
        messagebox.showinfo("员工信息排序", "员工信息已排序！")

    def save_to_file(self):
        # 保存员工信息到txt文件
        with open("employees.txt", "w") as f:
            for employee in self.employees:
                f.write(f"{employee.id}, {employee.name}, {employee.salary}, {employee.performance}, {employee.deduction}, {employee.net_salary}\n")
        messagebox.showinfo("保存到txt文件", "员工信息已保存到txt文件！")

    def run(self):
        self.root.mainloop()

if __name__ == "__main__":
    ems = EmployeeManagementSystem()
    ems.run()

这个程序使用了Python的tkinter库来创建GUI界面，通过输入框、标签和按钮等控件实现了员工信息的输入、显示、排序和保存。同时程序使用了Employee类来定义员工对象，方便管理。