Daily Notes hashtag updater

tag_updater.py

#!/usr/bin/python3

import os
import datetime as dt
import glob
from typing import List

def get_date_from_filename(filename: str) -> dt.date:
    print(filename)
    date_string = filename.split('.md')[0][2:]
    file_date = dt.datetime.strptime(date_string, '%Y-%m-%d')
    print(file_date)
    return file_date

def get_hashtag_string_from_date(date: dt.date) -> str:
    year_string = date.isocalendar()[0]
    week_string = date.isocalendar()[1]
    hashtag_string = f'#w{week_string}_{year_string} #y{year_string}\n'
    print(hashtag_string)
    return hashtag_string

def add_hashtag_time_to_note(hashtag_string: str, file_content: List[str]) -> List[str]:
    updated_content = [
        file_content[0],
        '\n',
        hashtag_string,
        *file_content[1:],
    ]
    return updated_content

for filename in glob.glob('./2020-*'):
    print(filename)
    updated_content: List[str] = []
    with open(filename, 'r') as fp:
        lines = fp.readlines()
        print(lines)
        date: dt.date = get_date_from_filename(filename)
        hashtag_string: str = get_hashtag_string_from_date(date)
        updated_content = add_hashtag_time_to_note(hashtag_string, lines)
        print(updated_content)
    with open(filename, 'w') as fw:
        fw.write(''.join(updated_content))

exit(0)