2022-07-07 16:50:39
Пишем GUI калькулятор на Python tkinter
Код из видео:
from tkinter import *
def btn_click(item):
global expression
try:
input_field['state'] = "normal"
expression += item
input_field.insert(END, item)
if item == '=':
result = str(eval(expression[:-1]))
input_field.insert(END, result)
expression = ""
input_field['state'] = "readonly"
except ZeroDivisionError:
input_field.delete(0, END)
input_field.insert(0, 'Ошибка (деление на 0)')
except SyntaxError:
input_field.delete(0, END)
input_field.insert(0, 'Ошибка')
def bt_clear():
global expression
expression = ""
input_field['state'] = "normal"
input_field.delete(0, END)
input_field['state'] = "readonly"
root = Tk()
root.geometry("268x288")
root.resizable(0, 0)
root.title("Калькулятор")
frame_input = Frame(root)
frame_input.grid(row=0, column=0, columnspan=4, sticky="nsew")
input_field = Entry(frame_input, font='Arial 15 bold', width=24, state="readonly")
input_field.pack(fill=BOTH)
buttons = (('7', '8', '9', '/', '4'),
('4', '5', '6', '*', '4'),
('1', '2', '3', '-', '4'),
('0', '.', '=', '+', '4')
)
expression = ''
button = Button(root, text='C', command=lambda: bt_clear())
button.grid(row=1, column=3, sticky="nsew")
for row in range(4):
for col in range(4):
Button(root, width=2, height=3, text=buttons[row][col],
command=lambda row=row, col=col: btn_click(buttons[row][col])).grid \
(row=row + 2, column=col, sticky="nsew", padx=1, pady=1)
root.mainloop()
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