import collections
import operator


def compare(x, y):
  if x[1] > y[1]:
    return 1
  elif x[1] < y[1]:
    return -1
  elif x[1] == y[1]:
    if x > y:
      return 1
    elif x < y:
      return -1
    return 0


document = "Practice makes perfect, you'll get perfecT by practice. just practice! just just just!!"
words = document.split()
d = collections.defaultdict(int)
for word in words:
  word = word.lower()
  word = [c if c >= 'a' and c <= 'z' else "" for c in word]
  word = "".join(word)
  d[word] += 1
output = []
d = sorted(d.items(), cmp=compare, reverse=True)
print(d)

#getting: [('just', 4), ('practice', 3), ('perfect', 2), ('youll', 1), ('makes', 1), ('get', 1), ('by', 1)]
#expected: [["just","4"],["practice","3"],["perfect","2"],["makes","1"],["youll","1"],["get","1"],["by","1"]]