Accepts the path to a text file and extracts the words from it, without repetition, and writs them to a text file 'unique_words_list.txt' in the samedirectory/folder.

words_from_textfile.py

# -*- encoding: utf-8 -*-
# !/usr/bin/env python3
"""
Accepts the path to a text file and extracts the words from it, without repetition,
and writs them to a text file 'unique_words_list.txt' in the samedirectory/folder.
"""
from pathlib import Path


def extract_words(filepath):
	filepath = Path(filepath).expanduser()
	text = filepath.read_text()
	text = text.replace(',', ' ')
	text = text.replace('\n', ' ')
	text = set(text.split())
	text = set(word.split("'")[0] for word in text)
	return text


if __name__ == '__main__':
	filepath = input('Enter the path to the text (*.txt) file from which words are to be extracted:')
	filepath = Path(filepath)
	text = extract_words(filepath)
	Path(filepath.with_name('unique_words_list.txt')).write_text('\n'.join(sorted(text)))