Я действительно застрял здесь, и, поскольку я новичок, я понятия не имею, как решить эту проблему. .
Вот весь код, который в конечном итоге скопирован, но даже в этом случае он не работает, и я не могу решить его самостоятельно.
Код: Выделить всё
from tkinter import *
import tkinter as tk
expression = ""
def press(num):
global expression
expression = expression + str(num)
equation.set(expression)
def equalpress():
try:
global expression
total = str(eval(expression))
equation.set(total)
expression = ""
except:
equation.set("error")
expression = ""
def clearentry():
global expression
expression = ""
equation.set("")
if __name__ == "__main__":
gui = Tk()
gui.configure(background="sky blue")
gui.title("Calc is short for calculator chat")
gui.geometry("270x150")
equation = StringVar()
expression_field = Entry(gui, textvariable=equation)
expression_field.grid(columnspan=4,ipadx=80)
button1 = Button(gui, text = '1', fg='black', bg='white',
command=lambda: press(1), height=1, width=7)
button1.grid(row=2,column=0)
button2 = Button(gui, text = '2', fg='black', bg='white',
command=lambda: press(2), height=1, width=7)
button2.grid(row=2,column=1)
button3 = Button(gui, text=' 3 ', fg='black', bg='white',
command=lambda: press(3), height=1, width=7)
button3.grid(row=2, column=2)
button4 = Button(gui, text=' 4 ', fg='black', bg='white',
command=lambda: press(4), height=1, width=7)
button4.grid(row=3, column=0)
button5 = Button(gui, text=' 5 ', fg='black', bg='white',
command=lambda: press(5), height=1, width=7)
button5.grid(row=3, column=1)
button6 = Button(gui, text=' 6 ', fg='black', bg='white',
command=lambda: press(6), height=1, width=7)
button6.grid(row=3, column=2)
button7 = Button(gui, text=' 7 ', fg='black', bg='white',
command=lambda: press(7), height=1, width=7)
button7.grid(row=4, column=0)
button8 = Button(gui, text=' 8 ', fg='black', bg='white',
command=lambda: press(8), height=1, width=7)
button8.grid(row=4, column=1)
button9 = Button(gui, text=' 9 ', fg='black', bg='white',
command=lambda: press(9), height=1, width=7)
button9.grid(row=4, column=2)
button0 = Button(gui, text=' 0 ', fg='black', bg='white',
command=lambda: press(0), height=1, width=7)
button0.grid(row=5, column=0)
plus = Button(gui, text='+', fg='black', bg='white',
command=lambda: press("+"), height=1, width=7)
plus.grid(row=2, column=3)
minus = Button(gui, text='-', fg='black', bg='white',
command=lambda: press("-"), height=1, width=7)
minus.grid(row=3, column=3)
multiply = Button(gui, text=' * ', fg='black', bg='white',
command=lambda: press("*"), height=1, width=7)
multiply.grid(row=4, column=3)
divide = Button(gui, text=' / ', fg='black', bg='white',
command=lambda: press("/"), height=1, width=7)
divide.grid(row=5, column=3)
equal = Button(gui, text=' = ', fg='black', bg='white',
command=equalpress, height=1, width=7)
equal.grid(row=5, column=2)
clear = Button(gui, text='Clear', fg='black', bg='white',
command= clear, height=1, width=7) **#this is where it doesnt work for me**
clear.grid(row=5,column=1)
Decimal = Button(gui, text='.', fg='black', bg='white',
command=lambda: press('.'), height=1, width=7)
Decimal.grid(row=6, column=0)
gui.mainloop()
Подробнее здесь: https://stackoverflow.com/questions/787 ... calculator