Part 1 of the factory method pattern

factory_pattern_part1.py

import os
from docx import Document

class DocParser:
    def parse(self,document):
        parser = get_format(document)
        return parser(document)

def get_format(document):
    format = os.path.splitext(document)[-1]
    return get_parser(format)

def get_parser(format):
    if format == '.txt':
        return parse_txt
    elif format == '.docx':
        return parse_docx
    else:
        raise ValueError(format)

def parse_txt(document):
    with open(document, 'r') as file:
        string = file.read().replace('\n', ' ')
    return string 
 
def parse_docx(document):
    doc = Document(document)
    string = ''
    for para in doc.paragraphs:
        string += f'{para.text} '
    return string