标签:csdn padding class imp tle nts ace space event
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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 > |
标签:csdn padding class imp tle nts ace space event
原文地址:http://www.cnblogs.com/hanson1/p/7100155.html