RegEx for matching UK Postcodes
I’m after a regex that will validate a full complex UK postcode only within an input string. All of the uncommon postcode forms … Read more
regex-group
RegEx to extract all matches from string using RegExp.exec
I’m trying to parse the following kind of string: [key:”val” key2:”val2″] where there are arbitrary key:”val” pairs inside. I want to grab the … Read more
python re.sub group: number after \number
How can I replace foobar with foo123bar? This doesn’t work: >>> re.sub(r'(foo)’, r’\1123′, ‘foobar’) ‘J3bar’ This works: >>> re.sub(r'(foo)’, r’\1hi’, ‘foobar’) ‘foohibar’ I … Read more
Named regular expression group “(?Pregexp)”: what does “P” stand for?
In Python, the (?P<group_name>…) syntax allows one to refer to the matched string through its name: >>> import re >>> match = re.search(‘(?P<name>.*) … Read more
What is a non-capturing group in regular expressions?
How are non-capturing groups, i.e., (?:), used in regular expressions and what are they good for? 1 18 Let me try to explain … Read more