如何将此正则表达式修改为与Python中的“＆”不匹配？

Question

Background

I would like to extract a piece of information out of a string. For example,

NO PARKING (SANITATION BROOM SYMBOL) 8-9:30AM TUES & FRI

Because it's only TUES and FRI . It's not a range of days so I would like to just get ['TUES', 'FRI']

However, for something like

2 HOUR PARKING 9AM-5PM MON THRU SAT

It would be a range of days so the result would be ['MON', 'TUES', 'WED', 'THURS', 'FRI', 'SAT']

I have this regex which works with a range of days but I would like to modify to except just one rule.

\b((?:(?:MON|MONDAY|TUES|TUESDAY|WED|WEDNESDAY|THURS|THURSDAY|FRI|FRIDAY|SAT|SATURDAY|SUN|SUNDAY)\s*)+)(?=\s|$)

It works with

NO STANDING 11AM-7AM MON SAT

which extracts MON and SAT . But I don't want it to match

NO PARKING (SANITATION BROOM SYMBOL) 8-9:30AM TUES & FRI

Because I have another regex which I want it to be matched.

Answer 1

If you have many regex I would suggest running them in specific order (give them a priority) such that the more specific regex / more important ones will match first. That way you could stop matching if one regex matched, in your case the "other" regex.