Word scrambler (so called "Cambridge Effect")

word-scrambler.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import re
import random

def myshuffle(xs):
  for i in range(len(xs)):
    ind = random.randint(i, len(xs) - 1)
    xs[i], xs[ind] = xs[ind], xs[i]
  return xs

def word_shuffle(p):
  if (len(p) < 2):
    return p
  mid = list(p[1:-1])
  mid = myshuffle(mid)
  mid = ''.join(mid)
  return p[0] + mid + p[-1]

def main():
  text = "Cognitive science is the interdisciplinary scientific study of the mind and its processes. It examines what cognition is, what it does and how it works."
  text = re.sub(r'([^a-zA-ZñÑáéíóúÁÉÍÓÚ0-9])', ' \g<1> ', text)
  text = re.sub(r'\s+', ' ', text)
  text = text.split(' ')
  text = [word_shuffle(p) for p in text]
  text = " ".join(text)
  text = re.sub(r' ([:;,.])', '\g<1>', text)
  text = re.sub(r'([(]) ', '\g<1>', text)
  text = re.sub(r' ([)])', '\g<1>', text)
  print(text)

if __name__ == '__main__':
  main()