本教程将指导您利用Python编程语言及Tkinter库构建一个功能简单的图形用户界面（GUI）计算器。通过一系列简洁明了的操作步骤，帮助初学者掌握基础的GUI应用程序开发技巧。
运行效果：完整代码
```python
from tkinter import *
def click(num):
global op
op = op + str(num)
iptext.set(op)
def evaluate():
global op
output = str(eval(op))
iptext.set(output)
def clearDisplay():
global op
op =
iptext.set(op)
calc = Tk()
calc.title(TechVidvan Calculator)
op =
iptext = StringVar()
display = Entry(calc, font=(arial, 20, bold), textvariable=iptext,
bd=30, insertwidth=4, width=14, bg=powder blue,
justify=right).grid(columnspan=4)
for i in range(10):
b = Button(calc, height=2,width=6,padx=9,pady=8,text=str(i),
command=lambda num=i: click(num)).grid(row=(i%5)+2,
column=((i-i%5)/4)%3)
bclear = Button(calc, text=Clear,height=2,width=6,command=clearDisplay).grid(row=1,column=0)
bequal = Button(calc,text==,height=2,width=6,command=evaluate).grid(row=1,column=1)
backspace = Button(calc,text=<-,height=2,width=6,command=lambda:iptext.set(iptext.get()[:-1])).grid(row=1,column=3)
```
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