Mi solution ejercicio 1

ex1.py

import re

def MaxWord(parrafo, palabrasNoValidas):
  parrafo2 = parrafo.lower()
  expression = r'\w+'
  res = re.findall(expression, parrafo2)
  
  ocurrences = {}
  for word in res:
      if word not in palabrasNoValidas:
          if word in ocurrences:
              ocurrences[word] += 1
          else:
              ocurrences[word] = 1

  print(ocurrences)
  print(max(ocurrences, key=ocurrences.get))