使用tkinter做一个简单的计算器

 主要思路：将数字和运算符号都作为按钮展现，当点击按钮时，数字显示在输入框中，点击=号是对数字进行运算，将原来的数字删除，将运算结果展示在输入框中。

注意！当第一个数是0的时候将这个0从输入框中进行删除，再输入其他数。

下面直接上代码：

import tkinter as tk
from tkinter import messageboxclass Calculator:"""这是一个包含加减乘除的简单的计算器"""def __init__(self,master):#定义界面self.e1 = tk.Entry(master,font = ('Arial',20),width=18)self.e1.grid(row = 0, columnspan=4, ipady=12)self.e1.insert('end', '0')self.b1 = tk.Button(master,text = '7',font=('Arial',15),bg = 'LightSkyBlue',width=4,command = self.seven)self.b1.grid(row=1,column=0)self.b2 = tk.Button(master, text='8', font=('Arial', 15),bg = 'LightSkyBlue', width=4, command = self.eight)self.b2.grid(row=1, column=1)self.b3 = tk.Button(master, text='9', font=('Arial', 15),bg = 'LightSkyBlue', width=4,command = self.nine)self.b3.grid(row=1, column=2)self.b4 = tk.Button(master, text='/', font=('Arial', 15),bg = 'orange', width=4,command = self.chu)self.b4.grid(row=1, column=3)self.b5 = tk.Button(master, text='4', font=('Arial', 15),bg = 'LightSkyBlue', width=4,command = self.four)self.b5.grid(row=2, column=0,pady=8)self.b6 = tk.Button(master, text='5', font=('Arial', 15),bg = 'LightSkyBlue', width=4,command = self.five)self.b6.grid(row=2, column=1,pady=8)self.b7 = tk.Button(master, text='6', font=('Arial', 15),bg = 'LightSkyBlue', width=4,command = self.six)self.b7.grid(row=2, column=2,pady=8)self.b8 = tk.Button(master, text='*', font=('Arial', 15),bg = 'orange', width=4,command = self.cheng)self.b8.grid(row=2, column=3,pady=8)self.b9 = tk.Button(master, text='1', font=('Arial', 15),bg = 'LightSkyBlue', width=4,command = self.one)self.b9.grid(row=3, column=0)self.b10 = tk.Button(master, text='2', font=('Arial', 15),bg = 'LightSkyBlue', width=4,command = self.two)self.b10.grid(row=3, column=1)self.b11 = tk.Button(master, text='3', font=('Arial', 15),bg = 'LightSkyBlue', width=4,command = self.three)self.b11.grid(row=3, column=2)self.b12 = tk.Button(master, text='-', font=('Arial', 15),bg = 'orange', width=4,command = self.jian)self.b12.grid(row=3, column=3)self.b13 = tk.Button(master, text='0', font=('Arial', 15),bg = 'LightSkyBlue', width=4,command = self.zero)self.b13.grid(row=4, column=0,pady=8)self.b14 = tk.Button(master, text='.', font=('Arial', 15),bg = 'LightSkyBlue', width=4,command = self.point)self.b14.grid(row=4, column=1,pady=8)self.b15 = tk.Button(master, text='+', font=('Arial', 15),bg = 'orange', width=4,command = self.add)self.b15.grid(row=4, column=2,pady=8)self.b16 = tk.Button(master, text='(', font=('Arial', 15),bg = 'orange', width=4, command=self.k1)self.b16.grid(row=5, column=0)self.b17 = tk.Button(master, text=')', font=('Arial', 15),bg = 'orange', width=4, command=self.k2)self.b17.grid(row=5, column=1)self.b18 = tk.Button(master, text='AC', font=('Arial', 15),bg = 'orange', width=4, command=self.de)self.b18.grid(row=5, column=2)self.b19 = tk.Button(master, text='=', font=('Arial', 15), bg = 'orange',width=4,height=3,command = self.cal)self.b19.grid(row=4, column=3,rowspan = 2)#定义button函数def zero(self):if self.e1.get() and self.e1.get() != '0':self.e1.insert('end','0')def one(self):if self.e1.get() != '0':self.e1.insert('end','1')else:self.e1.delete(0, 'end')self.e1.insert('end', '1')def two(self):if self.e1.get() != '0':self.e1.insert('end', '2')else:self.e1.delete(0, 'end')self.e1.insert('end', '2')def three(self):if self.e1.get() != '0':self.e1.insert('end','3')else:self.e1.delete(0, 'end')self.e1.insert('end', '3')def four(self):if self.e1.get() != '0':self.e1.insert('end', '4')else:self.e1.delete(0, 'end')self.e1.insert('end', '4')def five(self):if self.e1.get() != '0':self.e1.insert('end', '5')else:self.e1.delete(0, 'end')self.e1.insert('end', '5')def six(self):if self.e1.get() != '0':self.e1.insert('end', '6')else:self.e1.delete(0, 'end')self.e1.insert('end', '6')def seven(self):if self.e1.get() != '0':self.e1.insert('end', '7')else:self.e1.delete(0, 'end')self.e1.insert('end', '7')def eight(self):if self.e1.get() != '0':self.e1.insert('end','8')else:self.e1.delete(0, 'end')self.e1.insert('end', '8')def nine(self):if self.e1.get() != '0':self.e1.insert('end', '9')else:self.e1.delete(0, 'end')self.e1.insert('end', '9')def point(self):self.e1.insert('end','.')def add(self):self.e1.insert('end','+')def jian(self):self.e1.insert('end','-')def cheng(self):self.e1.insert('end','*')def chu(self):self.e1.insert('end','/')def k1(self):self.e1.insert('end','(')def k2(self):self.e1.insert('end',')')def de(self):self.e1.delete(0,'end')self.e1.insert('end', 0)def cal(self):if self.e1.get():try:res = eval(self.e1.get())self.e1.delete(0, 'end')self.e1.insert('end', res)except Exception as e:messagebox.showerror(title='错误信息', message=str(e))else:self.e1.insert('end', '0')if __name__ == '__main__':root = tk.Tk()root.title('计算器')root.geometry('280x310+200+100')root.resizable(0,0)Calculator(root)root.mainloop()

打包APP：可在虚拟环境中进行APP的打包，不会的可以参考我之前发的打包exe文件过大.txt-Python文档类资源-CSDN下载

这样，你就拥有了你自己的一款计算器了，O(∩_∩)O哈哈~

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