tkinter 中的十进制按钮

Question

大家好，所以我正在尝试在我尝试使用 tkinter 制作的计算器中实现一个十进制按钮。小数按钮有效，但在进行计算时它不考虑小数点后的任何内容，并且在我点击相等按钮后它保留最新的小数点。我不知道为什么。这是我现在的代码：

from tkinter import *

root = Tk()
root.title("Calculator")

e = Entry(root, width=35, borderwidth=5)
e.grid(row=0, column=0, columnspan=4, padx=10, pady=10)

def button_press(number):
    current = e.get()
    e.delete(0, END)
    e.insert(0, str(current) + str(number))

def button_clear():
    e.delete(0, END)

def button_equal():
    second_number = e.get()
    e.delete(0, END)

    if math == "addition":
        e.insert(0, f_num + float(second_number))
        
    if math == "subtraction":
        e.insert(0, f_num - float(second_number))
        
    if math == "multiplication":
        e.insert(0, f_num * float(second_number))
        
    if math == "division":
        e.insert(0, f_num / float(second_number))

    if math == "modulation":
        e.insert(0, f_num % int(float(second_number)))

   
def button_add():
    first_number = e.get()
    global f_num
    global math
    math = "addition"
    f_num = int(float(first_number))
    e.delete(0, END)

def button_subtract():
    first_number = e.get()
    global f_num
    global math
    math = "subtraction"
    f_num = int(float(first_number))
    e.delete(0, END)

def button_multiply():
    first_number = e.get()
    global f_num
    global math
    math = "multiplication"
    f_num = int(float(first_number))
    e.delete(0, END)

def button_divide():
    first_number = e.get()
    global f_num
    global math
    math = "division"
    f_num = int(float(first_number))
    e.delete(0, END)

def button_modulo():
    first_number = e.get()
    global f_num
    global math
    math = "modulation"
    f_num = int(float(first_number))
    e.delete(0, END)

def button_num(number):
    current=e.get()
    e.delete(0, END)
    e.insert(0,str(current)+ str(number))

def button_decimal():
    current = e.get()
    e.delete(0, END)
    e.insert(0, str(current) + str("."))

    

#Number buttons

button_1 = Button(root, text="1", padx=25, pady=20, command=lambda: button_press(1))
button_2 = Button(root, text="2", padx=25, pady=20, command=lambda: button_press(2))
button_3 = Button(root, text="3", padx=25, pady=20, command=lambda: button_press(3))
button_4 = Button(root, text="4", padx=25, pady=20, command=lambda: button_press(4))
button_5 = Button(root, text="5", padx=25, pady=20, command=lambda: button_press(5))
button_6 = Button(root, text="6", padx=25, pady=20, command=lambda: button_press(6))
button_7 = Button(root, text="7", padx=25, pady=20, command=lambda: button_press(7))
button_8 = Button(root, text="8", padx=25, pady=20, command=lambda: button_press(8))
button_9 = Button(root, text="9", padx=25, pady=20, command=lambda: button_press(9))
button_0 = Button(root, text="0", padx=25, pady=20, command=lambda: button_press(0))

#Function buttons

button_div = Button(root, text="/", padx=26, pady=20, command=button_divide)
button_mult = Button(root, text="*", padx=26, pady=20, command=button_multiply)
button_sub = Button(root, text="-", padx=26, pady=20, command=button_subtract)
button_C = Button(root, text="C", padx=24, pady=20, command=lambda: button_clear())
button_equal = Button(root, text="=", padx=24, pady=20, command=button_equal)
button_add = Button(root, text="+", padx=25, pady=20, command=button_add)
button_dec = Button(root, text=u'\u002E', padx=26, pady=20, command=button_decimal)
#button_lparen = Button(root, text="(", padx=26, pady=20, command=button_lparen)
#button_rparen = Button(root, text=")", padx=26, pady=20, command=button_rparen)
button_mod = Button(root, text="%", padx=24, pady=20, command=button_modulo)

#Frame

button_1.grid(row=3, column=0)
button_2.grid(row=3, column=1)
button_3.grid(row=3, column=2)
button_sub.grid(row=3, column=3)

button_4.grid(row=2, column=0)
button_5.grid(row=2, column=1)
button_6.grid(row=2, column=2)
button_mult.grid(row=2, column=3)

button_7.grid(row=1, column=0)
button_8.grid(row=1, column=1)
button_9.grid(row=1, column=2)
button_div.grid(row=1, column=3)

button_0.grid(row=4, column=0)
button_C.grid(row=4, column=1)
button_equal.grid(row=4, column=2)
button_add.grid(row=4, column=3)

button_dec.grid(row=5, column=0)
#button_lparen.grid(row=5, column=1)
#button_rparen.grid(row=5, column=2)
button_mod.grid(row=5, column=3)

Answer 1

我很确定这是因为您将任何浮点数（小数）转换为整数，这意味着 python 将忽略小数位后的任何数字。