How to put a filename into a variable via Python3?

Question

Python

Good afternoon. It is required to enter the file name into the variable. For example: there is a video file, I am manipulating it and the modified file must be named: original name + postscript, so I need to drive the name of the source file into a variable, so that later I can use it to name the changed one, the name needs to be saved without extension. How to do it?

Answer 1

>>> filename = input("Input filename: ")
Input filename: filename
>>> filename
'filename'

Answer 2

from os.path import basename
print(basename("/a/b/c.txt"))