I need some help writing regex expressions. I need an expression that can match the following patterns (including words and digits, spaces and commas):
Thus far, I wrote one expression which includes the first three patterns and all case variations:
r'(?i)(line item[\.*\,*\s*\d+]+]+|line[\.*\,*\s*\d+]+|lines[\.*\,*\s*\d+]+|line items[\.*\,*\s*\d+]+)'
I would like to include the last two patterns listed but not sure how. I have wrote this expression for the pattern matching "Lines 10 and 45" by modifying the capturing group as follows:
r'(Lines[\.*\,*\w*\s*\d+]+)'
However, it does not work as expected. It selects all word characters in the string. I would like to keep my expressions greedy, but not sure how to implement the last two patterns in the list.
Any suggestions please?
You may use
(?i)lines?(?:\s+items?)?\s*\d+(?:\.\d+)?(?:\s*(?:,|and)\s*\d+(?:\.\d+)?)*
See the regex demo.
Pattern details:
(?i) - ignore case inline modifierlines? - line or lines (? quantifier makes the preceding pattern optional, matching 1 or 0 occurrences)(?:\s+items?)? - an optional non-capturing group matching 1 or 0 occurrences of 1+ whitespaces followed with item and an optional s char\s* - 0+ whitespaces\d+(?:\.\d+)? - 1+ digits followed with an optional sequence of . and 1+ digits(?:\s*(?:,|and)\s*\d+(?:\.\d+)?)* - 0 or more repetitions of
\s* - 0+ whitespaces(?:,|and) - , or and char sequence\s* - 0+ whitespaces\d+(?:\.\d+)? - 1+ digits followed with an optional sequence of . and 1+ digits