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main.py
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main.py
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import tkinter as tk
import ast
import operator as op
operators = {ast.Add: op.add, ast.Sub: op.sub, ast.Mult: op.mul, ast.Div: op.truediv}
root = tk.Tk()
root.title("Alex CalcIt A.003")
entry = tk.Entry(root, width=35, borderwidth=5)
entry.grid(row=0, column=0, columnspan=3, padx=10, pady=10)
expression = ''
def eval_expr(expr):
return eval_(ast.parse(expr, mode='eval').body)
def eval_(node):
if isinstance(node, ast.Num):
return node.n
elif isinstance(node, ast.BinOp):
return operators[type(node.op)](eval_(node.left), eval_(node.right))
elif isinstance(node, ast.UnaryOp):
return operators[type(node.op)](eval_(node.operand))
else:
raise TypeError(node)
def button_click(number):
if number=='.' and entry.get().count('.') != 0:
return
entry.insert('end', number)
def clear_all():
global expression
entry.delete(0, 'end')
expression = ''
def clear():
entry.delete(0, 'end')
def delete():
entry.delete(len(entry.get())-1)
def add():
global expression
if expression:
expression += '+'
return
try:
current = entry.get()
expression += current
expression += '+'
entry.delete(0, 'end')
except ValueError:
pass
def subtract():
global expression
try:
current = entry.get()
expression += current
expression += '-'
entry.delete(0, 'end')
except ValueError:
pass
def multiply():
global expression
try:
current = entry.get()
expression += current
expression += '*'
entry.delete(0, 'end')
except ValueError:
pass
def divide():
global expression
try:
current = entry.get()
expression += current
expression += '/'
entry.delete(0, 'end')
except ValueError:
pass
def result():
global expression
try:
last = entry.get()
expression += last
entry.delete(0, 'end')
res = eval_expr(expression)
entry.insert('end', res)
expression = ''
expression += res
except (ValueError, TypeError):
pass
# Make button
button_1 = tk.Button(root, text="1", padx=40, pady=20, command=lambda: button_click(1))
button_2 = tk.Button(root, text="2", padx=40, pady=20, command=lambda: button_click(2))
button_3 = tk.Button(root, text="3", padx=40, pady=20, command=lambda: button_click(3))
button_4 = tk.Button(root, text="4", padx=40, pady=20, command=lambda: button_click(4))
button_5 = tk.Button(root, text="5", padx=40, pady=20, command=lambda: button_click(5))
button_6 = tk.Button(root, text="6", padx=40, pady=20, command=lambda: button_click(6))
button_7 = tk.Button(root, text="7", padx=40, pady=20, command=lambda: button_click(7))
button_8 = tk.Button(root, text="8", padx=40, pady=20, command=lambda: button_click(8))
button_9 = tk.Button(root, text="9", padx=40, pady=20, command=lambda: button_click(9))
button_0 = tk.Button(root, text="0", padx=88, pady=20, command=lambda: button_click(0))
button_add = tk.Button(root, text="+", padx=39, pady=20, command=add)
button_equal = tk.Button(root, text="=", padx=90, pady=20, command=result)
button_subtract = tk.Button(root, text="-", padx=41, pady=20, command=subtract)
button_multiply = tk.Button(root, text="*", padx=40, pady=20, command=multiply)
button_divide = tk.Button(root, text="/", padx=41, pady=20, command=divide)
button_delete = tk.Button(root, text='Del', padx=34, pady=20, command=delete)
button_clear = tk.Button(root, text='C', padx=39, pady=20, command=clear)
button_clearAll = tk.Button(root, text="CE", padx=36, pady=20, command=clear_all)
button_comma = tk.Button(root, text='.', padx=42, pady=20, command=lambda: button_click('.'))
# Show button on screen
button_1.grid(row=4, column=0)
button_2.grid(row=4, column=1)
button_3.grid(row=4, column=2)
button_4.grid(row=3, column=0)
button_5.grid(row=3, column=1)
button_6.grid(row=3, column=2)
button_7.grid(row=2, column=0)
button_8.grid(row=2, column=1)
button_9.grid(row=2, column=2)
button_0.grid(row=5, column=0, columnspan=2)
button_clear.grid(row=5, column=2)
button_add.grid(row=6, column=0)
button_equal.grid(row=6, column=1, columnspan=2)
button_subtract.grid(row=7, column=0)
button_multiply.grid(row=7, column=1)
button_divide.grid(row=7, column=2)
button_delete.grid(row=1, column=0)
button_clearAll.grid(row=1, column=1)
button_clear.grid(row=1, column=2)
button_comma.grid(row=5, column=2)
root.mainloop()