[Tkinter] changing title text to bold in tkinter

[Kumarkv]

How can i change title bar text to bold in tkinter.

i am getting below error

root.title("Counter Example", font="bold")

Error:
TypeError: wm_title() got an unexpected keyword argument 'font'

My version is python 3.5 and Tcl/tk 8.6

[menator01]

I do not think you can. Or at least I could not find anything in the docs. on that subject.

[Larz60+]

You need to select a font that has a bold format like:
root.title("Counter Example", font="Helvetica 18 bold")