clearsceeen 和 equal 函数在我的计算器代码中没有响应

Question

from tkinter import *

from math import *

    def btnClick(numbers):

    global operator

    operator=operator + str(numbers)

    text_input.set(operator)

def btnClearDisplay():

    global operator

    operator=""

    text_input.set=("")

def btnEqualsInput():

    global operator

    sumup=str(eval(operator))

    text_input.set(operator)

    operator=""

cal = Tk()

cal.title("Calculator")

operator = ""

text_input = StringVar()

txtDisplay = Entry(cal,font=("Helvetica", 15, 'italic'), 

textvariable=text_input, bd=18, insertwidth=4,

                           bg="grey", justify='right') .grid(columnspan=4)

btn7=Button(cal,padx=12,bd=8, fg="black", font=('arial',15,'bold'),

            text='7',command=lambda:btnClick(7), bg="silver") 

.grid(row=1,column=0)

btn8=Button(cal,padx=12,bd=8, fg="black", font=('arial',15,'bold'),

            text='8',command=lambda:btnClick(8), bg="silver") 

.grid(row=1,column=1)

btn9=Button(cal,padx=12,bd=8, fg="black", font=('arial',15,'bold'),

            text='9',command=lambda:btnClick(9), bg="silver") 

Answer 1

您的错误是您没有set正确调用该方法。考虑这个代码：text_input.set=("")注意=，这意味着您正在销毁该set方法并将其替换为空字符串。相反，您需要set像这样调用方法：text_input.set("")

Answer 2

对于 = 按钮。您的代码：def btnEqualsInput():    global operator    sumup=str(eval(operator))    text_input.set(operator)    operator=""LAGGY FIX，需要双击，我不知道为什么。def btnEqualsInput():    global operator    sumup=str(eval(operator))    text_input.set(operator)    operator=sumup完全固定：def btnEqualsInput():    global operator    sumup=str(eval(operator))    operator=sumup    text_input.set(operator)