gistfile1.txt

#!/usr/bin/python3

import re
import urllib.request as ur

history = dict()

request = ur.urlopen("http://www.flalottery.com/exptkt/l6.htm")
page_bytes = request.read()
page_characters = page_bytes.decode(request.headers.get_content_charset() or "UTF-8")
lines = page_characters.split("\n")

current_day = None

for line in lines:
    if "Page" in line:
        continue  # ignore a page number note

    # match a date, then prepare a new container for numbers
    match = re.search(">(\d+/\d+/\d+)<", line)
    if match:
        current_day = match.group(1)
        history[current_day] = set()

    match = re.search(">(\d+)<", line)
    if match:
        history[current_day].add(int(match.group(1)))

print(history)