calcul.py

from tkinter import *
from tkinter import ttk

operation = ''
temp_number = 0
#결과 출력 상태인지 상태저장
answer_trigger = False

#숫자버튼 처리함수
def button_pressed(value):
    global operation
    global answer_trigger

    if value == 'AC':
        number_entry.delete(0,'end')
        operation = ''
        #ac버튼 누르면, trigger 변수도 초기화
        answer_trigger = False
        print("AC pressed")
    else:
        #Trigger가 TRUE이면, Entry 초기화후 새로입력
        if answer_trigger:
            number_entry.delete(0,"end")
            answer_trigger = False
        number_entry.insert("end",value)
        print(value,"pressed")


#소수점으로 int형 변환시 에러가 날경우, float형으로 반환.
def float_filter(value):
    try:
        int(value)
        return int(value)
    except ValueError:
        return float(value)
    
#두값이 같으면 정수로 표현가능=>정수값으로 반환
def int_changer(value):
    if int(value) == float(value):
        return int(value)
    else:
        return float(value)

#사칙연산 처리함수
def math_button_pressed(value):
    global operation
    global temp_number
    if not number_entry.get() == '':
        operation = value
        #float_filter 함수 호출
        temp_number = float_filter(number_entry.get())
        number_entry.delete(0,'end')
        print(temp_number,operation)

def equal_button_pressed():
    global operation
    global temp_number
    global answer_trigger
    # 연산자나 숫자가 입력되지 않으면, 실행하지 않음
    if not (operation =='' and number_entry.get()==''):
        number = int(number_entry.get())
        if operation == '/':
            solution = temp_number/number
        elif operation == '*':
            solution = temp_number*number
        elif operation == '+':
            solution = temp_number+number
        else :
            solution = temp_number-number

        #int_changer() 함수를 한번 거쳐서, 값저장
        solution = int_changer(solution)
        number_entry.delete(0,'end')        
        number_entry.insert(0,solution)
        print(temp_number,operation,number,"=",solution)
        operation = ''
        temp_number = 0
        
        #계산 완료후, Trigger 변수 TRUE로 변경
        answer_trigger = True

root = Tk()
root.title("Calculator")
root.geometry("375x200") #크기 조절


def key_input(value):
    # print(value)
    # print(value.char)
    # print(repr(value.char))

    #쉬프트키 입력 무시(덧셈할때)
    if not repr(value.char) == "''":
        numbers = '1234567890'
        operators = '/*+-'
        #숫자키, button_pressed()함수 호출
        if value.char in numbers :
            button_pressed(value.char)
            print(value.char)
            #연산자 입력시, math_button_pressed()함수 호출
        elif value.char in operators:
            math_button_pressed(value.char)
            print(value.char)
        #엔터키 -> '='버튼
        elif value.keysym == "Return":
            equal_button_pressed()
            print("equal button pressed")
        #ESC 키 ->AC버튼 입력
        elif value.keysym == "Escape":
            button_pressed('AC')
            print('AC button pressed')
        #BackSpace 입력시, 마지막 한글자 삭제
        elif value.keysym == "BackSpace":
            number_entry.delete(len(number_entry.get())-1,'end')
        print(number_entry)

root.bind('<Key>', key_input)

entry_value = StringVar(root, value='')

number_entry = ttk.Entry(root, textvariable = entry_value, width=20)
number_entry.grid(row=0, columnspan=3)

button7 = ttk.Button(root, text="7", command = lambda:button_pressed('7'))
button7.grid(row=1, column=0)
button8 = ttk.Button(root, text="8", command = lambda:button_pressed('8'))
button8.grid(row=1, column=1)
button9 = ttk.Button(root, text="9", command = lambda:button_pressed('9'))
button9.grid(row=1, column=2)
button_div = ttk.Button(root, text="/",command = lambda:math_button_pressed('/') )
button_div.grid(row=1, column=3)

button4 = ttk.Button(root, text="4", command = lambda:button_pressed('4'))
button4.grid(row=2, column=0)
button5 = ttk.Button(root, text="5", command = lambda:button_pressed('5'))
button5.grid(row=2, column=1)
button6 = ttk.Button(root, text="6", command = lambda:button_pressed('6'))
button6.grid(row=2, column=2)
button_mult = ttk.Button(root, text="*",command = lambda:math_button_pressed('*') )
button_mult.grid(row=2, column=3)

button1 = ttk.Button(root, text="1", command = lambda:button_pressed('1'))
button1.grid(row=3,column=0)
button2 = ttk.Button(root, text="2", command = lambda:button_pressed('2'))
button2.grid(row=3, column=1)
button3 = ttk.Button(root, text="3", command = lambda:button_pressed('3'))
button3.grid(row=3, column=2)
button_add = ttk.Button(root, text="+",command = lambda:math_button_pressed('+'))
button_add.grid(row=3, column=3)

button_ac = ttk.Button(root, text="AC", command = lambda:button_pressed('AC'))
button_ac.grid(row=4, column=0)
button0 = ttk.Button(root, text="0", command = lambda:button_pressed('0'))
button0.grid(row=4, column=1)
button_equal = ttk.Button(root, text="=", command = lambda:equal_button_pressed())
button_equal.grid(row=4, column=2)
button_sub = ttk.Button(root, text="-",command = lambda:math_button_pressed('-') )
button_sub.grid(row=4, column=3)

root.mainloop()