用python40行代码编写的计算器

效果图

代码

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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):www.2cto.com     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() </button-1></button-1></button-1>