Replcae inner space in Python -

iam new python, , need remove space between string , digit not between 2 strings.

eg:

input : paragraph 25 in documents , paragraph number in file.

output : paragraph25 in documents , paragraph number in file.

how can done in python ? tried regex

re.sub("paragraph\s[a-z]", "paragraph[a-z]", input) 

but not working.

 >>> re.sub(r'\s+(\d+)', r'\1', 'program 25 fun') 'program25 fun' 

that might work in pinch. i'm not familiar regexes, can chime in more robust.

basically match on whitespace succeeded numbers , remove it.