I want to match the first 2 words in a string, except when the second one is “feat”, then I just want to match the first word. My plan: (w+(?: w+))(?!feat) does not work. “feat” gets matched everytime. I tried variations of the same, but to no avail. Here’s an example string: …
Tag: regex
Python regular expression help needed, multiple lines regex
I was trying to scape a link out of a .eml file but somehow I always get “NONE” as return for my search. But I don’t even get the link with the confirm brackets, no problem in getting that valid link once the string is pulled. One problem that I see is, that the string that is found by the
How to ignore strings that start with certain pattern using regular expression in python?
Accept and return @something but reject first@last. The above regexp will accept @something (starts with letter, ends with letter or number, may have underscore in middle, atleast 2 characters long) and returns the part after the @ symbol. I do not want to return strings which contain some letters or number A…
How to Ignore html comment tag in regex through python
I am replacing special character with some asci code and ignoring html tags with the help of below regex text_list = re.findall(r’>([Ss]*?)<‘, html) So it is ignoring all html tags as we want it but is not ignoring html comment closing tag “–>”. Any help appreciated. Wha…
Unit Testing regex to check for False Positives
so I have a Regex expression that I’m matching against a single string provided to check and match certain information. If it’s matched, only the captured group is returned. I have made my function so that it removes any null strings from the returned array and finally, just gives the captured str…
Replace a list of elements with regex
I have a text full of adverbes and it’s replacements like this : And i want the adverbes to replaced in my text: Example : but am runing out of solutions, my code so far: I couldn’t find a way to replace each adverbes with the appropriate replacement. the list_adverbes_replacement.txt is the text …
Python RegEx check string
im trying to set correct version on output. I have this possible strings: 0.0.4.1 # 1. 7.51.4.1 # 2. 0.1.4.1 # 3. and i need to check, if the “0.” is on the start (to set output without 0. or 0.0.) Output 1. will have just “4.1”, 2. gonna stay the same and 3. will be 1.4.1 Im trying to
Wrong result with regular expressions
Any idea why the regular expression below cuts the ‘fl’ part of the sentence ? This is the result I get : Answer You’re replacing all non-alphabetical characters with whitespace. In your code, the ‘fl’ is actually fl – a single unicode (non-AZ) character, so it is being remo…
substitute ‘=’ sign when an integer is encountered using python
Hi I am new to python and regex. I have a string which i want to reformat/substitute i did try with: Expected output: Answer You can match either the start of the string, or a space and comma without using a capture group and assert not a digit after matching a single digit. The pattern matches (?:^|, ) Non c…
How to match IP addresses in a comma-separated string
Code show as below, but there is a problem: “255.255.255.256” will be processed into “255.255.255.25” If I pass the 255.255.255.255,255.255.255.256,260.255.255.255 string I expect [“255.255.255.255”] as the results. Answer You want to implement comma boundaries, (?<![^,]…