Python using re.sub to remove after string.

Question

How do i remove everything after .rtf What I have so far removes .rtf and everything after it as well.

s = 'newyork.pdf.rtf.doc'
actual_file = re.sub(".rtf.+", "", s)

returns newyork.pdf

Answer 1

Option 1
Use a positive lookbehind (?<=\\.rtf).* :

>>> re.sub(r'(?<=\.rtf).*', '', s)
'newyork.pdf.rtf'

Option 2
Capture the .rtf and substitute the matching group back in:

>>> re.sub(r'(\.rtf).*', r'\1', s)
'newyork.pdf.rtf'