问如何仅当字符串中连续时才删除重复项？

EN

import re

# Only repeated numbers
answer = re.sub(r'(\d)\1+', r'\1', '12233322155552')

# Any repeated character
answer = re.sub(r'(.)\1+', r'\1', '12233322155552')

>>> s = '12233322155552'
>>> ''.join(i for i, _ in itertools.groupby(s))
'1232152'

for each char in the string do:
   if the current char is equal to the next char:
      delete next char
   else
     continue

return string

for s in string:
  if s == s+1:  ## check until the end of the string
     delete s+1