Question

I have a string 1 blahblahblah 2 sdsdsdsdsd 3 uuuuuu 4 eeee 5 abcdef
I would like to output

1 blahblahblah
2 sdsdsdsdsd
3 uuuuuu
4 eeee
5 abcdef

I have tried to add \n before every number by using re.split but it didn’t work

re.split(' (?=[1-9]:)', line)

Answer 1

The following works just fine:

re.sub(r'(\d+)', '\n\\1', input)

Demo:

>>> print(re.sub(r'(\d+)', r'\n\1', input))

1 blahblahblah 
2 sdsdsdsdsd 
3 uuuuuu 
4 eeee 
5 abcdef

The expression (\d+) matches 1 or more digits, and I replace that with a newline followed by the matched digits (via the capturing group).