I'm making a calculator with Python and Tkinter and I'm having problems with my calculator.
I'm trying to create an error message box wherein if there are double operations bundled together (ex. '--', ' -'), the message would pop up. I'm basically trying to add a restriction to my program but I don't know how to implement this. I just can't seem to get the try/except block code correct and I'm having problems on where to put it. I apologize if this seems like an easy question to someone. It's because I'm new to the field of programming.
Here's my code:
from PIL import Image, ImageTk
from tkinter import messagebox
# base
window = Tk()
window.title('Calculator')
window.geometry('258x455')
icon = ImageTk.PhotoImage(file='icon.png')
window.iconphoto(True, icon)
window.resizable(0, 0)
base_frame = Frame(window, bg='#292929', width=300, height=455)
window.config(background='#292929')
# functions
def btn_press(item):
global expression
expression = expression str(item)
input_text.set(expression)
def clear():
global expression
expression = ''
input_text.set('')
def equal():
global expression
result = str(eval(expression))
input_text.set(result)
expression = ''
try:
# what code should I put in
# and where should I put my try/except code
except SyntaxError:
messagebox.showerror('Calculation Error', 'You cannot bundle two or more operations together.')
input_text = StringVar()
expression = ''```
CodePudding user response:
It should be around the code that calculates the result.
def equal():
global expression
try:
result = str(eval(expression))
input_text.set(result)
expression = ''
except SyntaxError:
messagebox.showerror('Calculation Error', 'You cannot bundle two or more operations together.')