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In this article we show how to create radio buttons using Tkinter and python
A Radiobutton shows multiple choices to the user out of which, the user can select only one out of them. You can then attach a method or function to that button.
Syntax
Option | Description |
---|---|
activebackground | The background color of the widget when it has the focus. |
activeforeground | The font color of the widget text when it has the focus. |
anchor | This represents the exact position of the text within the widget if the widget contains more space than the requirement of the text. The default value is CENTER. |
bg | The background color. |
bitmap | This is used to display the graphics on the widget. It can be set to any graphical or image object. |
borderwidth | This represents the size of the border. |
command | This option is set to the procedure which must be called every-time when the state of the radiobutton is changed. |
cursor | The mouse pointer is changed to the specified cursor type. It can be set to the arrow, dot, etc. |
font | This represents the font type. |
fg | The normal foreground color. |
height | The vertical dimension of the widget. It is specified as the number of lines (not pixel). |
highlightcolor | This represents the color of the focus highlight when the widget has the focus. |
highlightbackground | The color of the focus highlight when the widget is not having the focus. |
image | It can be set to an image object if we want to display an image on the radiobutton instead the text. |
justify | It represents the justification of the multi-line text. It can be set to CENTER(default), LEFT, or RIGHT. |
padx | The horizontal padding of the widget. |
pady | The vertical padding of the widget. |
relief | The type of the border. The default value is FLAT. |
selectcolor | The color of the radio button when it is selected. |
selectimage | The image to be displayed on the radiobutton when it is selected. |
state | It represents the state of the radio button. The default state is NORMAL. However, we can set this to DISABLED to make the radiobutton unresponsive. |
text | The text to be displayed on the radiobutton. |
textvariable | It is of String type that represents the text displayed by the widget. |
underline | The default value of this option is -1, we can set this option to the number of character which is to be underlined. |
value | The value of each radiobutton is assigned to the control variable when it is turned on by the user. |
variable | It is the control variable which is used to keep track of the user's choices. It is shared among all the radiobuttons. |
width | The horizontal dimension of the widget. It is represented as the number of characters. |
wraplength | We can wrap the text to the number of lines by setting this option to the desired number so that each line contains only that number of characters. |
Methods
The radiobutton widget provides the following methods.
Method | Description |
---|---|
deselect() | Used to turn of the radiobutton. |
flash() | Used to flash the radiobutton between its active and normal colors few times. |
invoke() | Used to call any procedure associated when the state of a Radiobutton is changed. |
select() | Used to select the radiobutton. |
Example
Here are some examples
from tkinter import * def radioselected(): selection = "You selected the option " + str(var.get()) label.config(text = selection) root = Tk() var = IntVar() R1 = Radiobutton(root, text="Option 1", variable=var, value=1, command=radioselected) R1.pack( anchor = W ) R2 = Radiobutton(root, text="Option 2", variable=var, value=2, command=radioselected) R2.pack( anchor = W ) R3 = Radiobutton(root, text="Option 3", variable=var, value=3, command=radioselected) R3.pack( anchor = W) R4 = Radiobutton(root, text="Option 4", variable=var, value=4, command=radioselected) R4.pack( anchor = W) label = Label(root) label.pack() root.mainloop()
This will display something like this
another example
# Importing Tkinter module from tkinter import * from tkinter.ttk import * # Create Tkinter window win = Tk() win.geometry('200x200') # Tkinter string variable v = StringVar(win, "1") # Style class to add style to Radiobutton # it can be used to style any ttk widget style = Style(win) style.configure("TRadiobutton", background = "light blue", foreground = "red", font = ("arial", 12, "bold")) # Dictionary to create multiple buttons values = {"RadioButton 1" : "1", "RadioButton 2" : "2", "RadioButton 3" : "3", "RadioButton 4" : "4", "RadioButton 5" : "5"} # Loop is used to create multiple Radiobuttons for (text, value) in values.items(): Radiobutton(win, text = text, variable = v, value = value).pack(side = TOP, ipady = 5) mainloop()