Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
A calculator, created with Tkinter and Python. See https://www.hashbangcode.com/article/creating-simple-calculator-application-tkinter-python for more informaiton.
import tkinter as tk
class Calculator(tk.Tk):
def __init__(self):
super().__init__()
self.title("Calcuator")
self.buttons = {}
self.calculator_output = tk.Label(width=25, relief=tk.FLAT, bd=1, justify=tk.RIGHT, font="Helvetica 16")
self.calculator_output.grid(columnspan=5, row=0)
self.buttons['button_equals'] = tk.Button(self, text='=', font="Helvetica 16")
self.buttons['button_equals'].config(height=6)
self.buttons['button_equals'].config(command=lambda button='=': self.button_action(button))
self.buttons['button_equals'].grid(column=4, row=1, rowspan=4)
self.controls = [
['7','8','9','/'],
['4','5','6','*'],
['1','2','3','-'],
['C','0','. ','+'],
]
for i in range(0, len(self.controls)):
for j in range(0, len(self.controls[i])):
button_label = self.controls[i][j]
self.buttons['button_' + str(i) + '_' + str(j)] = tk.Button(self, text=button_label, font="Helvetica 16")
self.buttons['button_' + str(i) + '_' + str(j)].config(command=lambda button=button_label: self.button_action(button))
self.buttons['button_' + str(i) + '_' + str(j)].grid(column=j, row=i+1)
def button_action(self, button_pressed):
# React to the button being pressed.
if button_pressed == '=':
current_value = self.calculator_output.cget('text')
try:
result = eval(current_value)
if result != '':
self.calculator_output.config(text=result)
except:
self.calculator_output.config(text=current_value)
elif button_pressed == 'C':
self.calculator_output.config(text='')
else:
current_value = self.calculator_output.cget('text')
self.calculator_output.config(text=str(current_value) + button_pressed)
if __name__ == "__main__":
calculator = Calculator()
calculator.mainloop()
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment