def get_longest_page(shelf: shelve.DbfilenameShelf) -> (str, int):
# To hold the longest page and its number of words
longest_page = ""
longest_page_count = 0
# Get all urls from the shelve and loop through them
keys = shelf.keys()
for key in keys:
# Get the words for the current url and count its words
words = re.split(r"[\s\-–]", shelf[key])
word_count = len(words)
# If the amount of words for this url is more than the previous longest page, update the longest page and
# word amount
if word_count > longest_page_count:
longest_page_count = word_count
longest_page = key
# Return the longest page and its word amount as a 2-tuple
return longest_page, longest_page_count
