Python 提供了多个图形开发界面的库。Tkinter就是其中之一。 Tkinter 模块(Tk 接口)是 Python 的标准 Tk GUI 工具包的接口 .Tk 和 Tkinter 可以在大多数的 Unix 平台下使用,同样可以应用在 Windows 和 Macintosh 系统里。Tk8.0 的后续版本可以实现本地窗口风格,并良好地运行在绝大多数平台中。

该计算器使用Python tkinter模块开发

效果如下图

import tkinter #导入tkinter模块root = tkinter.Tk()root.minsize(280,500)root.title('李蛟龙的计算器')#1.界面布局#显示面板result = tkinter.StringVar()result.set(0) #显示面板显示结果1，用于显示默认数字0result2 = tkinter.StringVar() #显示面板显示结果2，用于显示计算过程result2.set('')#显示版label = tkinter.Label(root,font = ('微软雅黑',20),bg = '#EEE9E9',bd ='9',fg = '#828282',anchor = 'se',textvariable = result2)label.place(width = 280,height = 170)label2 = tkinter.Label(root,font = ('微软雅黑',30),bg = '#EEE9E9',bd ='9',fg = 'black',anchor = 'se',textvariable = result)label2.place(y = 170,width = 280,height = 60)#数字键按钮btn7 = tkinter.Button(root,text = '7',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('7'))btn7.place(x = 0,y = 285,width = 70,height = 55)btn8 = tkinter.Button(root,text = '8',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('8'))btn8.place(x = 70,y = 285,width = 70,height = 55)btn9 = tkinter.Button(root,text = '9',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('9'))btn9.place(x = 140,y = 285,width = 70,height = 55)btn4 = tkinter.Button(root,text = '4',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('4'))btn4.place(x = 0,y = 340,width = 70,height = 55)btn5 = tkinter.Button(root,text = '5',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('5'))btn5.place(x = 70,y = 340,width = 70,height = 55)btn6 = tkinter.Button(root,text = '6',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('6'))btn6.place(x = 140,y = 340,width = 70,height = 55)btn1 = tkinter.Button(root,text = '1',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('1'))btn1.place(x = 0,y = 395,width = 70,height = 55)btn2 = tkinter.Button(root,text = '2',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('2'))btn2.place(x = 70,y = 395,width = 70,height = 55)btn3 = tkinter.Button(root,text = '3',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('3'))btn3.place(x = 140,y = 395,width = 70,height = 55)btn0 = tkinter.Button(root,text = '0',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('0'))btn0.place(x = 70,y = 450,width = 70,height = 55)#运算符号按钮btnac = tkinter.Button(root,text = 'AC',bd = 0.5,font = ('黑体',20),fg = 'orange',command = lambda :pressCompute('AC'))btnac.place(x = 0,y = 230,width = 70,height = 55)btnback = tkinter.Button(root,text = '←',font = ('微软雅黑',20),fg = '#4F4F4F',bd = 0.5,command = lambda:pressCompute('b'))btnback.place(x = 70,y = 230,width = 70,height = 55)btndivi = tkinter.Button(root,text = '÷',font = ('微软雅黑',20),fg = '#4F4F4F',bd = 0.5,command = lambda:pressCompute('/'))btndivi.place(x = 140,y = 230,width = 70,height = 55)btnmul = tkinter.Button(root,text ='×',font = ('微软雅黑',20),fg = "#4F4F4F",bd = 0.5,command = lambda:pressCompute('*'))btnmul.place(x = 210,y = 230,width = 70,height = 55)btnsub = tkinter.Button(root,text = '-',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda:pressCompute('-'))btnsub.place(x = 210,y = 285,width = 70,height = 55)btnadd = tkinter.Button(root,text = '+',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda:pressCompute('+'))btnadd.place(x = 210,y = 340,width = 70,height = 55)btnequ = tkinter.Button(root,text = '=',bg = 'orange',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda :pressEqual())btnequ.place(x = 210,y = 395,width = 70,height = 110)btnper = tkinter.Button(root,text = '%',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda:pressCompute('%'))btnper.place(x = 0,y = 450,width = 70,height = 55)btnpoint = tkinter.Button(root,text = '.',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda:pressCompute('.'))btnpoint.place(x = 140,y = 450,width = 70,height = 55)#操作函数lists = [] #设置一个变量 保存运算数字和符号的列表isPressSign = False #添加一个判断是否按下运算符号的标志,假设默认没有按下按钮isPressNum = False#数字函数def pressNum(num): #设置一个数字函数 判断是否按下数字 并获取数字将数字写在显示版上 global lists #全局化lists和按钮状态isPressSign global isPressSign if isPressSign == False: pass else: #重新将运算符号状态设置为否 result.set(0) isPressSign = False #判断界面的数字是否为0 oldnum = result.get() #第一步 if oldnum =='0': #如过界面上数字为0 则获取按下的数字 result.set(num) else: #如果界面上的而数字不是0 则链接上新按下的数字 newnum = oldnum + num result.set(newnum) #将按下的数字写到面板中#运算函数def pressCompute(sign): global lists global isPressSign num = result.get() #获取界面数字 lists.append(num) #保存界面获取的数字到列表中 lists.append(sign) #讲按下的运算符号保存到列表中 isPressSign = True if sign =='AC': #如果按下的是'AC'按键，则清空列表内容，讲屏幕上的数字键设置为默认数字0 lists.clear() result.set(0) if sign =='b': #如果按下的是退格‘'，则选取当前数字第一位到倒数第二位 a = num[0:-1] lists.clear() result.set(a)#获取运算结果函数def pressEqual(): global lists global isPressSign curnum = result.get() #设置当前数字变量，并获取添加到列表 lists.append(curnum) computrStr = ''.join(lists) #讲列表内容用join命令将字符串链接起来 endNum = eval(computrStr) #用eval命令运算字符串中的内容# a = str(endNum)# b = '='+a #给运算结果前添加一个 ‘=' 显示 不过这样写会有BUG 不能连续运算，这里注释，不要 =# c = b[0:10] #所有的运算结果取9位数 result.set(endNum) #讲运算结果显示到屏幕1 result2.set(computrStr) #将运算过程显示到屏幕2 lists.clear() #清空列表内容root.mainloop()

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