On Wed, Dec 1, 2021 at 7:35 PM Abdulla Al Kathiri <alkathiri.abdulla@gmail.com> wrote:
Sometimes when I do complicated regular expressions, I like to divide the patterns from a big pattern to small patterns until I reach what I want. re module functions take the text as a second argument. Furthermore, you can’t pass the Match object directly, you need to extract the group/text from it. If we have a placeholder for the passed argument, we could do both 1) put it wherever we want, not necessarily first 2) further manipulate it so it becomes a valid argument
number = text -> re.search(pattern1, _) -> re.search(pattern2, _.group(0)) -> re.search(pattern3, _.group(1)) -> float(_.group(0))
Yeah that can look ugly I agree (here intentionally the placeholder is overused). But the person can still write a flowing chained operation if they want or if it’s easier for them to understand. Or just do it the traditional way …
text1 = re.search(pattern1, text).group(0) text2 = re.search(pattern2, text1).group(1) text3 = re.search(pattern3, text2).group(0) number = float(text3)
Yep, that would definitely be the cleaner way to do it. Not everything feels like a pipeline. ChrisA