combine-class-notes.py

import re
import os
import platform
import tempfile
import subprocess
import urllib.request

# https://stackoverflow.com/a/1732454/6307935
def get_links(url:str) -> list[str]:
    response = urllib.request.urlopen(url)
    content = response.read().decode("utf8")
    return re.findall(r"href=['\"]?([^'\" >]+)", content) 

schedule_url = input("please provide the link to the course's \"schedule\" page: ")

with tempfile.NamedTemporaryFile(delete=False, suffix=".html") as temp_file:
    temp_file_path = temp_file.name
    lecture_note_urls = [x for x in get_links(schedule_url) if "lecture-notes" in x]
    for url in lecture_note_urls:
        with urllib.request.urlopen(url) as response:
            if response.status == 200:
                temp_file.write(response.read())
            else:
                print(f"Failed to download \"{url}\"")

if platform.system() == 'Darwin': # macOS
    subprocess.call(('open', temp_file_path))
elif platform.system() == 'Windows': # Windows
    os.startfile(temp_file_path)
else: # linux
    subprocess.call(('xdg-open', temp_file_path))