Tagged Questions

3
votes
2answers
51 views

Is there a more sensible way of writing this regular expression?

The following regular expression is written in the Python dialect: ^( )*#(\s+\S(.*\S)?)?$ Can anyone see a better way to wright this? For those not sure what it is saying: It matches an entire ...
0
votes
1answer
25 views

Why local variable gets “remembered” in this case?

def word_to_syllable(w,li=[]): if not w: return li pattern = """ ######## """ pattern = re.sub("C","[^aeiou]",pattern) pattern = re.sub("V","[aeiou]",pattern) match ...
0
votes
1answer
23 views

Spelling corrector for non-English characters

Having read Peter Norvig's How to write a spelling corrector I tried to make the code work for Persian. I rewrote the code like this: import re, collections def normalizer(word): word = ...
0
votes
1answer
36 views

Python Regular Expression Escape or not

I need to write a regular expression to get all the characters in the list below.. (remove all the characters not in the list) allow_characters = ...
3
votes
2answers
40 views

Python regex - get all values from CSS declaration

I am working on a simple CSS parser in Python. Right now I want to extact all values from this string: "1px solid rgb(255, 255, 255)". Right now my pattern (which is not working) is: "\S+[^rgb]+". ...
0
votes
3answers
40 views

String greater-than-less-than Tests Against a Regular Expression

I am looking for matches between an alphabetically sorted list of strings and a regular expression using python. The regular expression is relatively simple, something like "block_number_[0-9]+", ...
0
votes
1answer
27 views

regex pattern to match specific start and end anchors with variable words in between

I am trying to normalize unstructured text files. I can't seem to figure out the expression for matching specific start and end boundaries with any degree of success. sample texts: "Section 13 - ...
1
vote
2answers
46 views

Remove nested newline characters in delimited file?

I have a caret-delimited file. The only carets in the file are delimiters -- there are none in text. Several of the fields are free text fields and contain embedded newline characters. This makes ...
4
votes
3answers
51 views

regex - how to match group of unique characters of certain length

I'm looking for a regex that will match ad-hoc groups of characters of certain length only if all its characters are unique. For the given string example: ...
-2
votes
1answer
31 views

Regex: Match repeating exact string of previous matched patten

I want to match parts of the string that is certain characters long (generic case: it will be a random patten) and will be matched again in the coming part of the entire string. For the given string ...
1
vote
3answers
30 views

returning string matching regular expression

I have a textfile with lines of which I want to extract one line that matches a certain pattern. Can I search for that line with a regular expression and return it, to work with it afterwards? Is ...
1
vote
2answers
39 views

regex named group starting with but not ends with

I have two regexes (simplified to be equal) r'^(?P<slug>(^foo)[-\w]+)/$' r'^(?P<slug>(^foo)[-\w]+)/$' I would to add an exclusion on the first to check for the end so the latter wins. ...
1
vote
3answers
46 views

Regex replace before and after text, keep text in place

I have some text like <br /> blah <br /> blah blah Which im trying to change to: <p> blah </p> <p> blah blah </p> I have the following regex newContent = ...
0
votes
2answers
46 views

Python: Use list.index with regular expression

I have lists of strings of which i want to extract a certain value: ["bla","blabla","blablabla","time taken to build model: 5.1 seconds", "blabla"] Normally I would look for the index of the ...
1
vote
3answers
45 views

Python regex - (\w+) results different output when used with complex expression

I have doubt on python regex operation. Here you go my sample test. >>>re.match(r'(\w+)','a-b') gives an output >>> <_sre.SRE_Match object at 0x7f51c0033210> ...

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