what is non-grouping version of regular parentheses
python, regex
Solution
shortly: Non-grouping means it will not be matched into a group. that is, you cannot reference it by \1 for example.
Problem
Possible Duplicate: Non capturing group? From python re module document, i see: ``` (?:...) Non-grouping version of regular parentheses. ``` and ``` (...) Matches the RE inside the parentheses. The contents can be retrieved or matched later in the string. ``` What's differece?