[Python] How do I get a font to stay the same when someone runs my tkinter exe on their...

I'm trying to create a GUI standalone application using tkinter. Where is a font dependency issue while running the script. Getting AttributeError: 'NoneType' object has no attribute 'add_file'. Below is the code and error screenshot.

import pyglet,tkinter

if name == "main":

pyglet.font.add_file('fonts/Cera-Round-Bold.ttf')

root = tkinter.Tk()
MyLabel = tkinter.Label(root,text="test",font=('Cera Round Variable DEMO',25))
MyLabel.pack()
root.mainloop()


Error screenshot Font Style/Name

Tried using pyglet module. No luck.

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