Python编程使用tkinter模块实现计算器软件完整代码示例


            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0

result2 = 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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