In Python, how do I split a string and keep the separators?

Question

Here\'s the simplest way to explain this. Here\'s what I\'m using:

re.split(\'\\W\', \'foo/bar spam\\neggs\')
-> [\'foo\', \'bar\', \'spam\', \'eggs\']
         


        

Answer 1

1. replace all seperator: (\W) with seperator + new_seperator: (\W;)

2. split by the new_seperator: (;)

def split_and_keep(seperator, s):
  return re.split(';', re.sub(seperator, lambda match: match.group() + ';', s))

print('\W', 'foo/bar spam\neggs')