📜  使用 PySimpleGUI 的计算器 – Python

📅  最后修改于: 2022-05-13 01:55:51.960000             🧑  作者: Mango

使用 PySimpleGUI 的计算器 – Python

先决条件: PySimpleGUI、评估

PySimpleGUI 是一个Python包,它使各个级别的Python程序员都可以创建 GUI。您可以使用包含小部件(它们在 PySimpleGUI 中称为“元素”)的“布局”来指定您的 GUI 窗口。在本文中,我们将学习如何在Python使用 PySimpleGUI 制作计算器。

在开始之前,我们需要安装这个包:

pip install PySimpleGUI

方法:

  • 导入 PySimpleGUI 模块
  • 创建 GUI 布局和窗口
  • 向主窗口添加任意数量的小部件
  • 在小部件上应用事件触发器。

下面是 GUI 的样子:



让我们使用Python PySimpleGUI 模块创建一个基于 GUI 的简单计算器,它可以执行基本算术运算的加法、减法、乘法和除法。

让我们一步一步地理解实现:-

Step1:创建文本框、按钮

为了创建一个文本框,我们将使用Txt()方法。

这里将使用ReadFormButton()方法使用读取按钮。

第二步:创建一个无限循环,读取按钮值并执行操作。

Python3
# Result Value
Result = ''
  
# Make Infinite Loop
while True:
    # Button Values
    button, value = form.Read()
      
    # Check Press Button Values
    if button=='c':
        Result = ''
        form.FindElement('input').Update(Result)
    elif button=='«':
        Result = Result[:-1]
        form.FindElement('input').Update(Result)
    elif len(Result) == 16 :
        pass
      
   # Results
    elif button=='=':
        Answer = eval(Result)
        Answer = str(round(float(Answer),3))
        form.FindElement('input').Update(Answer)
        Result = Answer
    # close the window
    elif button=='Quit'  or button==None:
        break
    else:
        Result += button
        form.FindElement('input').Update(Result)


Python3
# Import Module
from PySimpleGUI import *
  
# GUI Layout
layout = [[Txt(''  * 10)],
          [Text('', size = (15, 1), font = ('Helvetica', 18),
                text_color = 'black', key = 'input')],
          [Txt(''  * 10)],
          [ReadFormButton('c'), ReadFormButton('«')],
          [ReadFormButton('7'), ReadFormButton('8'), ReadFormButton('9'), ReadFormButton('/')],
          [ReadFormButton('4'), ReadFormButton('5'), ReadFormButton('6'), ReadFormButton('*')],
          [ReadFormButton('1'), ReadFormButton('2'), ReadFormButton('3'), ReadFormButton('-')],
          [ReadFormButton('.'), ReadFormButton('0'), ReadFormButton('='), ReadFormButton('+')],
          ]
  
# Set PySimpleGUI
form = FlexForm('CALCULATOR', default_button_element_size = (5, 2),
                auto_size_buttons = False, grab_anywhere = False)
form.Layout(layout)
  
# Result Value
Result = ''
  
# Make Infinite Loop
while True:
    # Button Values
    button, value = form.Read()
      
    # Check Press Button Values
    if button == 'c':
        Result = ''
        form.FindElement('input').Update(Result)
    elif button=='«':
        Result = Result[:-1]
        form.FindElement('input').Update(Result)
    elif len(Result) == 16 :
        pass
      
   # Results
    elif button == '=':
        Answer = eval(Result)
        Answer = str(round(float(Answer),3))
        form.FindElement('input').Update(Answer)
        Result = Answer
          
    # close the window
    elif button == 'Quit'  or button == None:
        break
    else:
        Result += button
        form.FindElement('input').Update(Result)


以下是完整的实现:

蟒蛇3

# Import Module
from PySimpleGUI import *
  
# GUI Layout
layout = [[Txt(''  * 10)],
          [Text('', size = (15, 1), font = ('Helvetica', 18),
                text_color = 'black', key = 'input')],
          [Txt(''  * 10)],
          [ReadFormButton('c'), ReadFormButton('«')],
          [ReadFormButton('7'), ReadFormButton('8'), ReadFormButton('9'), ReadFormButton('/')],
          [ReadFormButton('4'), ReadFormButton('5'), ReadFormButton('6'), ReadFormButton('*')],
          [ReadFormButton('1'), ReadFormButton('2'), ReadFormButton('3'), ReadFormButton('-')],
          [ReadFormButton('.'), ReadFormButton('0'), ReadFormButton('='), ReadFormButton('+')],
          ]
  
# Set PySimpleGUI
form = FlexForm('CALCULATOR', default_button_element_size = (5, 2),
                auto_size_buttons = False, grab_anywhere = False)
form.Layout(layout)
  
# Result Value
Result = ''
  
# Make Infinite Loop
while True:
    # Button Values
    button, value = form.Read()
      
    # Check Press Button Values
    if button == 'c':
        Result = ''
        form.FindElement('input').Update(Result)
    elif button=='«':
        Result = Result[:-1]
        form.FindElement('input').Update(Result)
    elif len(Result) == 16 :
        pass
      
   # Results
    elif button == '=':
        Answer = eval(Result)
        Answer = str(round(float(Answer),3))
        form.FindElement('input').Update(Answer)
        Result = Answer
          
    # close the window
    elif button == 'Quit'  or button == None:
        break
    else:
        Result += button
        form.FindElement('input').Update(Result)

输出: