python GUI之tkinter编写界面计算器

以下是一个简单的Python GUI计算器，使用了Tkinter模块。

# 导入Tkinter模块
from tkinter import *

# 创建主窗口
root = Tk()
root.title("计算器")

# 设置计算器的输入框和输出框
input_box = Entry(root, width=40, borderwidth=5)
input_box.grid(row=0, column=0, columnspan=4, padx=10, pady=10)

output_box = Entry(root, width=40, borderwidth=5)
output_box.grid(row=1, column=0, columnspan=4, padx=10, pady=10)

# 定义计算函数
def calculate():
    # 获取输入框的内容
    equation = input_box.get()
    
    try:
        # 尝试计算结果
        result = eval(equation)
        # 将结果显示在输出框中
        output_box.delete(0, END)
        output_box.insert(0, result)
    except:
        # 如果计算出错，显示错误信息
        output_box.delete(0, END)
        output_box.insert(0, "Error")

# 定义按钮的点击事件
def button_click(number):
    current = input_box.get()
    input_box.delete(0, END)
    input_box.insert(0, str(current) + str(number))

def button_clear():
    input_box.delete(0, END)
    output_box.delete(0, END)

def button_add():
    current = input_box.get()
    input_box.delete(0, END)
    input_box.insert(0, str(current) + "+")

def button_subtract():
    current = input_box.get()
    input_box.delete(0, END)
    input_box.insert(0, str(current) + "-")

def button_multiply():
    current = input_box.get()
    input_box.delete(0, END)
    input_box.insert(0, str(current) + "*")

def button_divide():
    current = input_box.get()
    input_box.delete(0, END)
    input_box.insert(0, str(current) + "/")

# 创建按钮
button_1 = Button(root, text="1", padx=40, pady=20, command=lambda: button_click(1))
button_2 = Button(root, text="2", padx=40, pady=20, command=lambda: button_click(2))
button_3 = Button(root, text="3", padx=40, pady=20, command=lambda: button_click(3))
button_4 = Button(root, text="4", padx=40, pady=20, command=lambda: button_click(4))
button_5 = Button(root, text="5", padx=40, pady=20, command=lambda: button_click(5))
button_6 = Button(root, text="6", padx=40, pady=20, command=lambda: button_click(6))
button_7 = Button(root, text="7", padx=40, pady=20, command=lambda: button_click(7))
button_8 = Button(root, text="8", padx=40, pady=20, command=lambda: button_click(8))
button_9 = Button(root, text="9", padx=40, pady=20, command=lambda: button_click(9))
button_0 = Button(root, text="0", padx=40, pady=20, command=lambda: button_click(0))

button_add = Button(root, text="+", padx=39, pady=20, command=button_add)
button_subtract = Button(root, text="-", padx=41, pady=20, command=button_subtract)
button_multiply = Button(root, text="*", padx=40, pady=20, command=button_multiply)
button_divide = Button(root, text="/", padx=41, pady=20, command=button_divide)

button_clear = Button(root, text="清空", padx=79, pady=20, command=button_clear)
button_equal = Button(root, text="=", padx=91, pady=20, command=calculate)

# 显示按钮
button_1.grid(row=2, column=0)
button_2.grid(row=2, column=1)
button_3.grid(row=2, column=2)

button_4.grid(row=3, column=0)
button_5.grid(row=3, column=1)
button_6.grid(row=3, column=2)

button_7.grid(row=4, column=0)
button_8.grid(row=4, column=1)
button_9.grid(row=4, column=2)

button_0.grid(row=5, column=0)

button_add.grid(row=5, column=1)
button_subtract.grid(row=6, column=0)
button_multiply.grid(row=6, column=1)
button_divide.grid(row=6, column=2)

button_clear.grid(row=7, column=0, columnspan=2)
button_equal.grid(row=7, column=2, columnspan=2)

# 运行主循环
root.mainloop()

这是一个简单的计算器，支持加减乘除四则运算。用户可以点击按钮输入数字和操作符，计算结果将显示在输出框中。如果计算出错，输出框将显示“Error”。