Python 3 – Tkinter Message

If you are looking to display a message in your Python application, the Tkinter message widget can be a great option. The message widget provides a space to display a short message, along with some basic formatting options.

Creating a Message Widget

To create a message widget in Tkinter, you can use the following code:

import tkinter as tk

root = tk.Tk()

message = tk.Message(root, text="Hello, world!")

message.pack()

root.mainloop()

In this example, we start by importing the tkinter module and creating a root window. We then create a message widget with the tk.Message() method, and set the text parameter to the message we want to display. Finally, we call the pack() method on the message widget to add it to the GUI.

Changing the Message Text

You can change the text of a message widget dynamically by using the configure() method. Here is an example:

import tkinter as tk

root = tk.Tk()

message = tk.Message(root, text="Hello, world!")

message.pack()

message.configure(text="Goodbye, world!")

root.mainloop()

In this example, we start by creating a message widget with the text “Hello, world!”. We then call the configure() method on the message widget and set the text parameter to “Goodbye, world!”. This will change the text of the message widget to the new value.

Formatting the Message Text

You can format the text of a message widget using a special markup language called Text Widget Markup Language (TWML). TWML allows you to add formatting options such as font size, bold, italic, and more.

Here is an example of how to use TWML to format the text of a message widget:

import tkinter as tk

root = tk.Tk()

message = tk.Message(root, text="Hello, world!\n\nThis text is bold and red.")

message.pack()

message.configure(fg="red", font=("Arial", 12, "bold"))
message.tag_configure("bold", font=("Arial", 12, "bold"))

message.insert("end", "\n\nThis text is bold and red.", ("bold",))

root.mainloop()

In this example, we start by creating a message widget with two lines of text. The second line of text is formatted as bold and red using TWML formatting.

To apply the formatting, we first call the configure() method on the message widget and set the fg parameter to “red” to change the font color. We also set the font parameter to a tuple of font settings, which includes the font name, size, and weight.

We then use the tag_configure() method to create a new tag called “bold”. This tag defines the font style settings for any text that is tagged with “bold”.

Finally, we use the insert() method to add the second line of text to the message widget. We also pass in the tuple ("bold",) as the third parameter to apply the “bold” tag to the text.

Conclusion

In this article, we looked at how to use the Tkinter message widget to display a message in our Python GUI applications. We demonstrated how to create a message widget, change its text dynamically, and format the text using TWML markup. With these tools, you can create informative messages that are easy to read and understand for your users.