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def lyric_frequencies(lyrics_db):
  '''
  create a dictionary with 
  keys = unique lyrics (words)
  vals = number of occurrences in the lyrics db
  '''
  lyrics_dict = {}
  # loop through lyrics_db elements
  for lyric in lyrics_db:
    if lyric in lyrics_dict:

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def towers_rec(n, home, destination, temp):
  if n == 1:
    moves.append((home+' to '+destination))
  else:
    towers_rec(n-1, home, temp, destination)
    towers_rec(1, home, destination, temp)
    towers_rec(n-1, temp, destination, home)

if __name__ == "__main__":
  print('Elements are stacked at position A, which is \'home\'.\n  \

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def fib_eff(n, dict):
  '''
  performace-aware recursive algorithm: 
  keep track of computed Fibonacci terms in a dictionary; 
  limit computation to terms not in the dictionary
  '''
  if n in dict:
    return dict[n]
  else:
    fibn = fib_eff(n-1, dict) + fib_eff(n-2, dict)

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import random

def bubble_sorted_list(ulist):
  '''
  sort ulist by pairwise checks (aka BUBBLE SORT):
  pairwise comparisons from start (index 0) to end (index n), 
  shifting higher values toward the end
  '''
  swap = True
  while swap:

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import random

def selection_sorted_list(ulist):
  '''
  sort a list recursively by shifting the minimum value of the portion of the 
  list to the right of a comparator index to the comparator index; the index 
  increases by 1 on each pass up to len(list)
  '''
  uoindex = 0
  while uoindex != len(ulist):

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I deployed to Heroku and custom fonts didn't work. Details of my starting point below.
Fixed in 2 steps:
1. In application.rb file, in class Application < Rails::Application, added:
      config.assets.paths << Rails.root.join("app","assets","fonts")
2. In application.scss file, in @font-face, changed src: url('...') to font-url('...'); e.g.:
      src: font-url('Aileron/Aileron-Regular.otf') format('opentype');

Redeployed to Heroku and custom fonts worked.
---
Starting point details (this all worked for a local deploy, but not when deployed on Heroku):

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def setpy():
    """
    python sets are collections of objects which are:
    unique
    unordered
    unchangeable*
    * where unchangeable means individual items can't be replaced in place, but items can be removed and new items added
    """

    # unique and unsorted

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# select letters one at a time to guess mystery word
import string
import random
from words_json import words

def get_valid_word(words):
    word = random.choice(words)
    while '-' in word or ' ' in word:
        word = random.choice(words)

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import random

def is_win(g, s):
  '''check for a win, assign win value, return boolean'''
  if all(g[i] == s[i] for i in range(len(s))):
    win = True
    print(f'You won! The code was {s}')
    return win
  else:
    win = False

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# select letters one at a time to guess mystery word
import string
import random
from words_json import words

def get_valid_word(words):
    word = random.choice(words)
    while '-' in word or ' ' in word:
        word = random.choice(words)