Python：使用 Tkinter 的权重转换 GUI

先决条件： Python GUI – tkinter
Python为开发 GUI（图形用户界面）提供了多种选择。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输出创建 GUI 应用程序的最快和最简单的方法。使用 Tkinter 创建 GUI 是一项简单的任务。

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
• 在小部件上应用事件触发器。
  

下面是 GUI 的样子：

让我们创建一个基于 GUI 的重量转换器，它接受千克输入值，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。

Python3

# Python program to  create 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 = 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：