Trying to use re.findall to capture two different outcomes

Question

I am trying to use re.findall to capture two different outcomes off a webpage.

For example, I want to find both "save $10.00" and "$100.00" if the save exists and if it does not exist then just find the "$100".

I have tried save ?\$\d{1,5}.

Thanks in advance!

Answer 1

You may use

re.findall(r'(?:\bsave\s+)?\$\d+(?:\.\d+)?', s)

See the regex demo.

Details

• (?:\bsave\s+)? - an optional non-capturing group matching
  • \bsave - whole word save
  • \s+ - 1+ whitespaces
• \$ - a $ char
• \d+ - 1+ digits
• (?:\.\d+)? - an optional non-capturing group matching
  • \. - a dot
  • \d+ - 1+ digits

Mind that you need to use non-capturing groups to make whole sequences of pattern since re.findall only returns (list of) tuples if capturing groups are defined in the pattern and that causes lots of confusion.