我必须使用 Tkinter 在 Python 中创建一个 5 函数计算器,它处理 2 个变量并提供一个出口。还需要有错误消息。我已经布置了计算器并定义了功能,但没有任何反应。此外,任何想法如何添加错误消息。现在,当您按下按钮时,错误消息(插入函数的名称)缺少 1 个必需的位置参数:'app'。我完全被卡住了,无法弄清楚。我显然对此很陌生。我相信这很简单。谢谢!
from tkinter import *
from math import *
app = Tk()
app.title('Calculator')
app.geometry('400x500')
Label(app, text = "Welcome to Calculator 2013. Enjoy!").pack(padx = 10, pady = 10)
Label(app, text = "Enter both of your variables and then pick your computations below.").pack(pady = 10)
global var1, var2, total
Label(text='First Variable').pack()
var1 = Entry()
var1.insert(0,0)
var1.pack()
Label(text='Final Variable').pack()
var2 = Entry()
var2.insert(0,0)
var2.pack()
Label(text='Total').pack()
Total = Entry()
Total.pack()
def add():
global var1, var2, total
first = float(var1.get())
second = float(entry.get())
total = first + second
total.delete(0,END)
total.insert(0, str(total))
def subtract(app):
global var1, var2, total
first = float(var1.get())
second = float(var2.get())
total = first - second
total.delete(0,END)
total.insert(0, str(total))
def divide(app):
global var1, var2, total
first = float(var1.get())
second = float(var2.get())
total = first / second
total.delete(0,END)
total.insert(0, str(total))
def multiply(app):
global var1, var2, total
first = float(var1.get())
second = float(var2.get())
total = first * second
total.delete(0,END)
total.insert(0, str(total))
def clear(app):
global var1, var2, total
var1.delete(0,END)
var2.delete(0,END)
total.delete(0,END)
def quit(app):
app.destroy()
b_add = Button(app, text="+", bg="green", fg="black", width = 5, font=12, command = add).pack(side=LEFT)
b_sub = Button(app, text="-", bg="red", fg="white", width = 5, font=12, command = subtract).pack(side=LEFT)
b_sub = Button(app, text="*", bg="blue", fg="white", width = 5, font=12, command = multiply).pack(side=LEFT)
b_div = Button(app, text="/", bg="yellow", fg="black", width = 5, font=12, command = divide).pack(side=LEFT)
b_clear = Button(app, text="Clear", bg="black", fg="white", width = 5, font=12, command = clear).pack(side=LEFT)
b_exit = Button(app, text="Exit?", bg="white", fg="red", width = 40, font=12, command = quit).pack(side=LEFT)
app.protocol("WM_DELETE_WINDOW", quit)
app.mainloop()