用python实现的简易计算器

from tkinter import *
class Change:
def __init__(self):
window=Tk()
window.title("Button deal")

s=''
frame1=Frame(window)
frame2=Frame(window)
frame2.pack()
frame1.pack()
button0=Button(frame1,text='0',command=self.pressb0)
button1=Button(frame1,text='1',command=self.pressb1)
button2=Button(frame1,text='2',command=self.pressb2)
button3=Button(frame1,text='3',command=self.pressb3)
button4=Button(frame1,text='4',command=self.pressb4)
button5=Button(frame1,text='5',command=self.pressb5)
button6=Button(frame1,text='6',command=self.pressb6)
button7=Button(frame1,text='7',command=self.pressb7)
button8=Button(frame1,text='8',command=self.pressb8)
button9=Button(frame1,text='9',command=self.pressb9)
buttona=Button(frame1,text='+',command=self.pressba)
buttonb=Button(frame1,text='-',command=self.pressbb)
buttonc=Button(frame1,text='*',command=self.pressbc)
buttond=Button(frame1,text='/',command=self.pressbd)
buttone=Button(frame1,text='c',command=self.pressbe)
buttonf=Button(frame1,text='=',command=self.pressbf)
self.label=Label(frame2,text=s)

self.label.pack()
#self.label.grid(row=1)
button0.grid(row=5,column=2)
button1.grid(row=2,column=1)
button2.grid(row=2,column=2)
button3.grid(row=2,column=3)
button4.grid(row=3,column=1)
button5.grid(row=3,column=2)
button6.grid(row=3,column=3)
button7.grid(row=4,column=1)
button8.grid(row=4,column=2)
button9.grid(row=4,column=3)
buttona.grid(row=2,column=4)
buttonb.grid(row=3,column=4)
buttonc.grid(row=4,column=4)
buttond.grid(row=5,column=1)
buttone.grid(row=5,column=3)
buttonf.grid(row=5,column=4)

window.mainloop()

def pressb0(self):
self.label['text']+='0'

def pressb1(self):
self.label['text']+='1'

def pressb2(self):
self.label['text']+='2'

def pressb3(self):
self.label['text']+='3'

def pressb4(self):
self.label['text']+='4'

def pressb5(self):
self.label['text']+='5'

def pressb6(self):
self.label['text']+='6'

def pressb7(self):
self.label['text']+='7'

def pressb8(self):
self.label['text']+='8'

def pressb9(self):
self.label['text']+='9'

def pressba(self):
self.label['text']+='+'

def pressbb(self):
self.label['text']+='-'

def pressbc(self):
self.label['text']+='*'

def pressbd(self):
self.label['text']+='/'

def pressbe(self):#清除
self.label['text']=''

def pressbf(self):
self.label['text']=str(eval(self.label['text']))

Change()

写的有点长（新手），可以用循环去简化一些代码，这是我写的第一个GUI程序，可能中间会有bug,但是通过这个程序，自己确实也学到了很多东西。下面说一下我对类中self新的理解吧，self就相当于C语言中的define,使用self的变量就相当于一个全局变量，调用后就可以在整个类的函数中都可以改变它。