python实现简易版计算器

来源：中文源码网    浏览： 次    日期：2018年9月2日

【下载文档:  python实现简易版计算器.txt 】

(友情提示:右键点上行txt文档名->目标另存为)

python实现简易版计算器 学了一周的Python，这篇文章算是为这段时间自学做的小总结。

一、Python简介 Python是一门十分优美的脚本语言，如果学过java、c++那入门Python是非常简单的。Python具有丰富和强大的类库。它常被昵称为胶水语言，它能够很轻松的把用其他语言制作的各种模块(尤其是C/C++)轻松地联结在一起。常见的一种应用情形是，使用Python快速生成程序的原型(有时甚至是程序的最终界面)，然后对其中有特别要求的部分，用更合适的语言改写。

二、Python版计算器的实现工具准备： 1. Python2.7

2. wxPython

3. wxGlade界面编辑工具

4. pyCharm

具体配置什么的我就不说了，网上有很多。Python的GUI开发库有很多，这里我们使用wxPython。用wxGlade编辑界面，wxGlade是一款很好用的GUI编辑工具，它最大的优点是能自动生成编辑好的图形界面的代码。

这里主要介绍几点：wx.TextCtrl(文本输入控件)，这个作为计算器的显示屏，点击数字时用AppendText方法将数字添加至文本末尾，要取出数字时用GetValue方法，点击运算符时要将文本框中的数字清空(先存储)用Clear方法然后还有将操作符保存，点击等号后要将第二个操作数存储，然后用int方法将字符串转换为数字，计算后用SetValue方法将结果送入文本框，具体代码如下：

import wx

# begin wxGlade: extracode

# end wxGlade

class MyFrame(wx.Frame):

def __init__(self, *args, **kwds):

# begin wxGlade: MyFrame.__init__

kwds["style"] = wx.DEFAULT_FRAME_STYLE

wx.Frame.__init__(self, *args, **kwds)

self.text_ctrl_1 = wx.TextCtrl(self, -1, "",style=wx.TE_READONLY)

self.button_37 = wx.Button(self, -1, "1")

self.button_38 = wx.Button(self, -1, "2")

self.button_39 = wx.Button(self, -1, "3")

self.button_40 = wx.Button(self, -1, "+")

self.button_41 = wx.Button(self, -1, "4")

self.button_42 = wx.Button(self, -1, "5")

self.button_43 = wx.Button(self, -1, "6")

self.button_44 = wx.Button(self, -1, "-")

self.button_46 = wx.Button(self, -1, "7")

self.button_45 = wx.Button(self, -1, "8")

self.button_47 = wx.Button(self, -1, "9")

self.button_48 = wx.Button(self, -1, "x")

self.button_49 = wx.Button(self, -1, "C")

self.button_50 = wx.Button(self, -1, "0")

self.button_51 = wx.Button(self, -1, "=")

self.button_52 = wx.Button(self, -1, "/")

self.__set_properties()

self.__do_layout()

self.Bind(wx.EVT_BUTTON, self.bu1, self.button_37)

self.Bind(wx.EVT_BUTTON, self.bu2, self.button_38)

self.Bind(wx.EVT_BUTTON, self.bu3, self.button_39)

self.Bind(wx.EVT_BUTTON, self.bu_plus, self.button_40)

self.Bind(wx.EVT_BUTTON, self.bu4, self.button_41)

self.Bind(wx.EVT_BUTTON, self.bu5, self.button_42)

self.Bind(wx.EVT_BUTTON, self.bu6, self.button_43)

self.Bind(wx.EVT_BUTTON, self.bu_min, self.button_44)

self.Bind(wx.EVT_BUTTON, self.bu7, self.button_46)

self.Bind(wx.EVT_BUTTON, self.bu8, self.button_45)

self.Bind(wx.EVT_BUTTON, self.bu9, self.button_47)

self.Bind(wx.EVT_BUTTON, self.bu_mul, self.button_48)

self.Bind(wx.EVT_BUTTON, self.bu_clear, self.button_49)

self.Bind(wx.EVT_BUTTON, self.bu0, self.button_50)

self.Bind(wx.EVT_BUTTON, self.bu_result, self.button_51)

self.Bind(wx.EVT_BUTTON, self.bu_chu, self.button_52)

# end wxGlade

self.Show(True)

def __set_properties(self):

# begin wxGlade: MyFrame.__set_properties

self.SetTitle("Python Calculater by CYG")

self.text_ctrl_1.SetMinSize((400, 50))

self.button_37.SetMinSize((100, 50))

self.button_38.SetMinSize((100, 50))

self.button_39.SetMinSize((100, 50))

self.button_40.SetMinSize((100, 50))

self.button_41.SetMinSize((100, 50))

self.button_42.SetMinSize((100, 50))

self.button_43.SetMinSize((100, 50))

self.button_44.SetMinSize((100, 50))

self.button_46.SetMinSize((100, 50))

self.button_45.SetMinSize((100, 50))

self.button_47.SetMinSize((100, 50))

self.button_48.SetMinSize((100, 50))

self.button_49.SetMinSize((100, 50))

self.button_50.SetMinSize((100, 50))

self.button_51.SetMinSize((100, 50))

self.button_52.SetMinSize((100, 50))

# end wxGlade

def __do_layout(self):

# begin wxGlade: MyFrame.__do_layout

sizer_2 = wx.BoxSizer(wx.VERTICAL)

sizer_3 = wx.BoxSizer(wx.VERTICAL)

grid_sizer_1 = wx.GridSizer(4, 4, 0, 0)

sizer_3.Add(self.text_ctrl_1, 0, 0, 0)

grid_sizer_1.Add(self.button_37, 0, 0, 0)

grid_sizer_1.Add(self.button_38, 0, 0, 0)

grid_sizer_1.Add(self.button_39, 0, 0, 0)

grid_sizer_1.Add(self.button_40, 0, 0, 0)

grid_sizer_1.Add(self.button_41, 0, 0, 0)

grid_sizer_1.Add(self.button_42, 0, 0, 0)

grid_sizer_1.Add(self.button_43, 0, 0, 0)

grid_sizer_1.Add(self.button_44, 0, 0, 0)

grid_sizer_1.Add(self.button_46, 0, 0, 0)

grid_sizer_1.Add(self.button_45, 0, 0, 0)

grid_sizer_1.Add(self.button_47, 0, 0, 0)

grid_sizer_1.Add(self.button_48, 0, 0, 0)

grid_sizer_1.Add(self.button_49, 0, 0, 0)

grid_sizer_1.Add(self.button_50, 0, 0, 0)

grid_sizer_1.Add(self.button_51, 0, 0, 0)

grid_sizer_1.Add(self.button_52, 0, 0, 0)

sizer_3.Add(grid_sizer_1, 1, wx.EXPAND, 0)

sizer_2.Add(sizer_3, 1, wx.EXPAND, 0)

self.SetSizer(sizer_2)

sizer_2.Fit(self)

self.Layout()

# end wxGlade

def bu1(self, event): # wxGlade: MyFrame.self.text_ctrl_1.AppendText("1")

event.Skip()

def bu2(self, event): # wxGlade: MyFrame.self.text_ctrl_1.AppendText("2")

event.Skip()

def bu3(self, event): # wxGlade: MyFrame.self.text_ctrl_1.AppendText("3")

event.Skip()

def bu_plus(self, event): # wxGlade: MyFrame.self.num1=self.text_ctrl_1.GetValue()

self.op="+"

self.text_ctrl_1.Clear()

event.Skip()

def bu4(self, event): # wxGlade: MyFrame.self.text_ctrl_1.AppendText("4")

event.Skip()

def bu5(self, event): # wxGlade: MyFrame.self.text_ctrl_1.AppendText("5")

event.Skip()

def bu6(self, event): # wxGlade: MyFrame.self.text_ctrl_1.AppendText("6")

event.Skip()

def bu_min(self, event): # wxGlade: MyFrame.self.num1=self.text_ctrl_1.GetValue()

self.op="-"

self.text_ctrl_1.Clear()

event.Skip()

def bu7(self, event): # wxGlade: MyFrame.self.text_ctrl_1.AppendText("7")

event.Skip()

def bu8(self, event): # wxGlade: MyFrame.self.text_ctrl_1.AppendText("8")

event.Skip()

def bu9(self, event): # wxGlade: MyFrame.self.text_ctrl_1.AppendText("9")

event.Skip()

def bu_mul(self, event): # wxGlade: MyFrame.self.num1=self.text_ctrl_1.GetValue()

self.op="x"

self.text_ctrl_1.Clear()

event.Skip()

def bu_clear(self, event): # wxGlade: MyFrame.self.text_ctrl_1.Clear()

event.Skip()

def bu0(self, event): # wxGlade: MyFrame.self.text_ctrl_1.AppendText("0")

event.Skip()

def bu_chu(self, event): # wxGlade: MyFrame.self.num1=self.text_ctrl_1.GetValue()

self.op="/"

self.text_ctrl_1.Clear()

event.Skip()

def bu_result(self, event): # wxGlade: MyFrame.self.num2=self.text_ctrl_1.GetValue()

num1=int(self.num1)

num2=int(self.num2)

if self.op=="+":

self.text_ctrl_1.SetValue(str(num1+num2))

elif self.op=="-":

self.text_ctrl_1.SetValue(str(num1-num2))

elif self.op=="x":

self.text_ctrl_1.SetValue(str(num1*num2))

elif self.op=="/":

self.text_ctrl_1.SetValue(str(num1/num2))

event.Skip()

# end of class MyFrame

if __name__ == "__main__":

app=wx.App(False)

myframe=MyFrame(None)

app.MainLoop() 按钮的ID，名称什么的我基本都是用wxGlade自动生成的。

没有做什么美化，只是为了练练手，给张图：以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持中文源码网。

亲,试试微信扫码分享本页! *^_^*