Python Regex Inconsistent Output Between Groups And Group Stack I am doing a little test to grab backslash (\) using python regex and what i found is a bit strange. the output is shown below, which is as expected. however, when i use .groups() as, i get. which is clearly wrong. not sure what is happening. try search.group() alone without print. it will give you '\\' not a backslash. yes it does. Quantifiers are normally greedy, which means they match as much as they can while still allowing the regex as a whole to match. that's what "backtracking" means most of the time: greedy quantifiers giving back characters they gobbled up so the rest of the regex can match what it needs to.
Python Regex Group Function Delft Stack Match.group(n) returns the single group number n. by convention, the 0th group is always the full matched string, so in your case the full file name. but what you want to get is the captured group with the index 1, so just specify that:. I will speculate that when processing re.findall output, it’s more consistent if all results are of the same type, string in this case. the return value is a list of tuples, whose elements are the matches from the various groups. in larger bodies of text, the call might well generate a list of more than one tuple. expanding your input a bit:.
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