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") 
.grid(row=1,column=2)

addition=Button(cal,padx=12,bd=8, fg="black", font=('arial',15,'bold'),
            text='+', bg="maroon",command=lambda:btnClick("+")) 
.grid(row=1,column=3)

btn4=Button(cal, padx=12,bd=8,fg="black",font=("arial", 15, 'bold'),
            text='4',command=lambda:btnClick(4), bg="lightblue") 
.grid(row=2,column=0) 

btn5=Button(cal, padx=12,bd=8,fg="black",font=("arial", 15, 'bold'),
            text='5',command=lambda:btnClick(5), bg="lightblue") 
.grid(row=2,column=1) 

btn6=Button(cal, padx=12,bd=8,fg="black",font=("arial", 15, 'bold'),
            text='6',command=lambda:btnClick(6), bg="lightblue") 
.grid(row=2,column=2) 

subraction=Button(cal, padx=12,bd=8,fg="black",font=("arial", 15, 'bold'),
            text='-',command=lambda:btnClick("-"), bg="lightblue") 
.grid(row=2,column=3) 

btn1=Button(cal, padx=12,bd=8,fg="black",font=("arial", 15, 'bold'),
            text='1',command=lambda:btnClick(1), bg="lightblue") 
.grid(row=3,column=0) 

btn2=Button(cal, padx=12,bd=8,fg="black",font=("arial", 15, 'bold'),
            text='2',command=lambda:btnClick(2), bg="lightblue") 
.grid(row=3,column=1) 

btn3=Button(cal, padx=12,bd=8,fg="black",font=("arial", 15, 'bold'),
            text='3',command=lambda:btnClick(3), bg="lightblue") 
.grid(row=3,column=2) 

multiplication=Button(cal, padx=12,bd=8,fg="black",font=("arial", 15, 'bold'),
            text='*',command=lambda:btnClick("*"), bg="lightblue") .grid(row=3,column=3) 

btn0=Button(cal, padx=12,pady=12,bd=8, fg="black",font=("arial", 15, 'bold'),
            text='0',command=lambda:btnClick(0), bg="lightblue") .grid(row=4,column=0) 

btnClear=Button(cal, padx=12,pady=12,bd=8, fg="black",font=("arial", 15, 'bold'),
            text='C', bg="lightblue", command=btnClearDisplay) .grid(row=4,column=1) 

equals=Button(cal, padx=12,pady=12,bd=8, fg="black",font=("arial", 15, 'bold'),
            text='=', bg="lightblue", command=btnEqualsInput) .grid(row=4,column=2) 

divide=Button(cal, padx=12,pady=12,bd=8, fg="black",font=("arial", 15, 'bold'),
            text='/', bg="lightblue", command=lambda:btnClick("/")) .grid(row=4,column=3) 


cal.mainloop()

Answer 1

您的错误是您没有正确调用set方法。考虑以下代码：

text_input.set=("")

请注意=，这意味着您要销毁set方法并将其替换为空字符串。相反，您需要像这样调用set方法：

text_input.set("")

Answer 2

还有=按钮。

您的代码：

def btnEqualsInput():
    global operator
    sumup=str(eval(operator))
    text_input.set(operator)
    operator=""

问题修复，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)

clearsceeen和equal函数无法在我的计算器代码中响应

2 个答案: