Python（使用Tkinter的重量转换GUI） _PythonTkinter

先决条件： Python GUI – Tkinter
Python提供了多种开发GUI(图形用户界面)的选项。在所有的GUI方法中, Tkinter是最常用的方法。它是Python随附的Tk GUI工具包的标准Python接口。带有tkinter的Python输出了创建GUI应用程序的最快, 最简单的方法。使用tkinter创建GUI很容易。
创建Tkinter的步骤：

导入模块–Tkinter
创建主窗口(容器)
将任意数量的小部件添加到主窗口
将事件触发器应用于小部件。

让我们创建一个基于GUI的重量转换器, 该转换器接受一个公斤输入值, 并在用户单击” 转换” 按钮时将该值转换为克, 磅和盎司。
下面是实现。

# Python program tocreate a simple GUI # weight converter using Tkinter from tkinter import *# Create a GUI window window = Tk()# Function to convert weight # given in kg to grams, pounds # and ounces def from_kg():# convert kg to gram gram = float (e2_value.get()) * 1000# convert kg to pound pound = float (e2_value.get()) * 2.20462 # convert kg to ounce ounce = float (e2_value.get()) * 35.274 # Enters the converted weight to # the text widget t1.delete( "1.0" , END) t1.insert(END, gram)t2.delete( "1.0" , END) t2.insert(END, pound)t3.delete( "1.0" , END) t3.insert(END, ounce)# Create the Label widgets e1 = Label(window, text = "Enter the weight in Kg" ) e2_value = http://www.srcmini.com/StringVar() e2 = Entry(window, textvariable = e2_value) e3 = Label(window, text ='Gram' ) e4 = Label(window, text = 'Pounds' ) e5 = Label(window, text = 'Ounce' )# Create the Text Widgets t1 = Text(window, height = 1 , width = 20 ) t2 = Text(window, height = 1 , width = 20 ) t3 = Text(window, height = 1 , width = 20 )# Create the Button Widget b1 = Button(window, text = "Convert" , command = from_kg)# grid method is used for placing # the widgets at respective positions # in table like structure e1.grid(row = 0 , column = 0 ) e2.grid(row = 0 , column = 1 ) e3.grid(row = 1 , column = 0 ) e4.grid(row = 1 , column = 1 ) e5.grid(row = 1 , column = 2 ) t1.grid(row = 2 , column = 0 ) t2.grid(row = 2 , column = 1 ) t3.grid(row = 2 , column = 2 ) b1.grid(row = 0 , column = 2 )# Start the GUI window.mainloop()

输出如下：