Python+tkinter使用40行代码实现计算器功能

from tkinter import * reset=True def buttonCallBack(event):  global label  global reset  num=event.widget['text']  if num=='C':   label['text']="0"   return  if num in "=":   label['text']=str(eval(label['text']))   reset=True   return  s=label['text']  if s=='0' or reset==True:   s=""   reset=False  label['text']=s+num #主窗口 root=Tk() root.wm_title("计算器") #显示栏1 label=Label(root,text="0",background="white",anchor="e") label['width']=35 label['height']=2 label.grid(row=1,columnspan=4,sticky=W) #按钮 showText="789/456*123-0.C+" for i in range(4):  for j in range(4):   b=Button(root,text=showText[i*4+j],width=7)   b.grid(row=i+2,column=j)   b.bind("<Button-1>",buttonCallBack) showText="()" for i in range(2):  b=Button(root,text=showText[i],width=7)  b.grid(row=6,column=2+i)  b.bind("<Button-1>",buttonCallBack) b=Button(root,text="=") b.grid(row=6,columnspan=2,sticky="we") b.bind("<Button-1>",buttonCallBack) root.mainloop()