只有在字符串中连续时如何删除重复项?

For a string such as '12233322155552', by removing the duplicates, I can get '1235'.

但我要保留的是'1232152'，只删除连续的重复项.

解决方案

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')