Hello friends, today's content is: use python to make a simple calculator, let's take a look at the effect first:
It can be seen that the program realizes the functions of addition, subtraction, multiplication and division, and can also find the remainder.
How to implement this program, first, we need to import the tkinter module
import tkinter #导入tkinter模块Create a tkinter window again
root = tkinter.Tk()
root.minsize(280,500)Let's implement our interface layout
#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() Then write the script for the current display version
#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)To make a calculator requires the function of digital buttons, so you need to write a script for the buttons
#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)Numeral buttons are not enough, arithmetic symbols are also needed.
#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)The following code is very simple, I will not go into details
#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
# 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
Finally, enter the loop
root.mainloop()Next is the complete code:
import tkinter #导入tkinter模块
root = tkinter.Tk()
root.minsize(280,500)
#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
#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
# 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()
Well, the content of this article is here, thank you for watching.