{"id":1279,"date":"2020-11-26T07:08:28","date_gmt":"2020-11-26T07:08:28","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=1279"},"modified":"2025-04-01T09:29:52","modified_gmt":"2025-04-01T09:29:52","slug":"tkinter-radio-button","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/tkinter\/tkinter-radio-button\/","title":{"rendered":"Tkinter Radio Button"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you’ll learn how to use the Tkinter radio button widget to allow users to select between one of a number of mutually exclusive choices.<\/p>\n\n\n\n

Introduction to Tkinter radio buttons #<\/a><\/h2>\n\n\n\n

Radio buttons allow you to select between one of a number of mutually exclusive choices.<\/p>\n\n\n\n

Typically, you use radio buttons together in a set. They’re a good option if you have a few choices that you want users to select.<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

To create radio buttons, you use the Radiobutton<\/code> widget. The following shows how to create radio buttons using the tk.Radiobutton<\/code> constructor:<\/p>\n\n\n

selected = tk.StringVar()\nr1 = ttk.Radiobutton(container, text='Option 1'<\/span>, value='Value 1'<\/span>, variable=selected)\nr2 = ttk.Radiobutton(container, text='Option 2'<\/span>, value='Value 2'<\/span>, variable=selected)\nr3 = ttk.Radiobutton(container, text='Option 3'<\/span>, value='value 3'<\/span>, variable=selected)\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
Each radio button has a different value. However, radio buttons in the same group share the same variable.<\/p>\n\n\n\n
The container<\/code> is the parent widget which you place the radio buttons on.<\/p>\n\n\n\n
The text<\/code> argument specifies the text that appears on the radio button.<\/p>\n\n\n\n
The value<\/code> argument specifies the value that the radio button will hold.<\/p>\n\n\n\n
The variable<\/code> must be a tk.StringVar()<\/code>.<\/p>\n\n\n\n
Tkinter radio button example #<\/a><\/h2>\n\n\n\n
The following program illustrates how to use radio buttons. It returns the selected size once you click the Get Selected Size<\/strong> button.<\/p>\n\n\n
import tkinter as<\/span> tk\nfrom tkinter import ttk\nfrom tkinter.messagebox import showinfo\n\n# root window<\/span>\nroot = tk.Tk()\nroot.geometry('300x220'<\/span>)\nroot.resizable(False<\/span>, False<\/span>)\nroot.title('Radio Button Demo'<\/span>)\n\n\ndef show_selected_size():\n    showinfo(\n        title='Result'<\/span>,\n        message=selected_size.get()\n    )\n\n\nselected_size = tk.StringVar()\nsizes = (('Small'<\/span>, 'S'<\/span>),\n         ('Medium'<\/span>, 'M'<\/span>),\n         ('Large'<\/span>, 'L'<\/span>),\n         ('Extra Large'<\/span>, 'XL'<\/span>),\n         ('Extra Extra Large'<\/span>, 'XXL'<\/span>))\n\n# label<\/span>\nlabel = ttk.Label(text=\"What's your t-shirt size?\"<\/span>)\nlabel.pack(fill='x'<\/span>, padx=5<\/span>, pady=5<\/span>)\n\n# radio buttons<\/span>\nfor<\/span> size in sizes:\n    r = ttk.Radiobutton(\n        root,\n        text=size[0<\/span>],\n        value=size[1<\/span>],\n        variable=selected_size\n    )\n    r.pack(fill='x'<\/span>, padx=5<\/span>, pady=5<\/span>)\n\n# button<\/span>\nbutton = ttk.Button(\n    root,\n    text=\"Get Selected Size\"<\/span>,\n    command=show_selected_size)\n\nbutton.pack(fill='x'<\/span>, padx=5<\/span>, pady=5<\/span>)\n\n\nroot.mainloop()\n<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n\n
\"\"<\/figure><\/div>\n\n\n\n
Summary #<\/a><\/h2>\n\n\n\n
  • Use ttk.Radiobutton(text, variable)<\/code> to create a radio button; the variable should be a tk.StringVar()<\/code><\/li>
  • A set of radio buttons share the same variable<\/code>.<\/li><\/ul>\n
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    Was this tutorial helpful ?<\/div>\n\t\t
    \n\t\t\t\n\t\t\t\t\n\t\t\t\t\t<\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t Yes <\/span>\n\t\t\t<\/button>\n\n\t\t\t\n\t\t\t\t\n\t\t\t\t\t<\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t No <\/span>\n\t\t\t<\/button>\n\t\t<\/div>\n\t<\/header>\n\n\t
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