How do I merge fonts in Python (fontTools.merge() throws error)

I tried running this code to merge two fonts but it resulted in an error

Code:

import fontTools as ft
print("Merge v.1.0")


# function to merge
ft.merge("ABeeZee.ttf","NotoEmoji.ttf")

Error:

My file system is fine:

  Merge
|
|____    Merge.py
|____    ABeeZee.ttf
|____    NotoEmoji.ttf