Tagged Questions

1
vote
1answer
23 views

Regex: dealing with unpredictable inputs: disallowed trailing (but otherwise OK) characters

I'm trying to write a regex that parses <stock ticker> - <company>. The problem is that the inputs are a little unpredictable and the formatting of allowed tickers is broad. One hyphen in ...
1
vote
3answers
36 views

count the number of images on a webpage, using urllib

For a class, I have an exercise where i need to to count the number of images on any give web page. I know that every image starts with , so I am using a regexp to try and locate them. But I keep ...
1
vote
1answer
27 views

Consecutive uppercase letters regex

I'm trying to use Regular expressions to find three consecutive uppercase letters within a string. I've tried using: \b([A-Z]){3}\b as my regex which works to an extent. However this only ...
1
vote
1answer
46 views

Easiest way to count cross platform newline patterns

What's the easiest way to count the number of newlines in a string that contains newlines that conform to the cross-platform newline pattern: '\r\n?|\n'. Say we're skipping white space, or white ...
1
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2answers
67 views

Python - How do i write only case statements and instances start with $ from input text file?

I want to only write into a file case line and all instances start with symbol $ in nvp_add function after statement Extended attributes from below input file, so i'm expecting for output like below ...
0
votes
1answer
66 views

Regex expression returns nothing. Why?

This returns nothing? # Enter your code for "Image Extractor" here. import re with open('site.html') as html: content = html.read() content = str(content) ...
1
vote
2answers
43 views

Acronyms with Full stops python

I have code which reads a text file and outputs the amount of TLA's in the text as a percentage out of how many lines contain text. import re total_lines = 0 matched_lines = 0 for line in ...
1
vote
2answers
69 views

Counting three letter acronyms in a line with Regex Python [on hold]

I need to make a program in python which looks through a given file. Let's say acronyms.txt, and then returns a percentage value of how many lines contain at least 1 three letter acronym. For example: ...
3
votes
1answer
78 views

RegExp search within part of string

I need some analog of Python method of Regexp object - search. It has three arguments: text, start position and end position and returns Match object that has start and end fields. I've got a ...
2
votes
1answer
64 views

Using variables in a reg-ex

So I matched (with the help of kind contributors on stack overflow) the item number in: User Number 1 will probably like movie ID: RecommendedItem[item:557, value:7.32173]the most! Now I'm trying ...
1
vote
3answers
39 views

Having difficulties writing the right Regular expression

I am trying to match item number in the following text: User Number 1 will probably like movie ID: RecommendedItem[item:557, value:7.32173]the most! Here is what I tried: myfile = ...
1
vote
6answers
107 views

How to replace the colons in this text using Python?

I have a file which looks like 1::12::33::1555 1::412::1245::23444 and so on. I need to get rid of the last argument, and replace the colons with commas. I have tried: myfile = open('words.txt', ...
2
votes
2answers
3k views

Regex to find urls in string in Python [duplicate]

Possible Duplicate: What's the cleanest way to extract URLs from a string using Python? Considering a string as follows: string = "<p>Hello World</p><a ...
1
vote
3answers
437 views

Python Regex that adds space after dot

How can I use re to write a regex in Python that finds the pattern: dot "." followed directly by any char [a-zA-Z] (not space or digit) and then add a space between the dot and the char? i.e. ...
0
votes
4answers
2k views

How do I split a comma delimited string in Python except for the commas that are within quotes

I am trying to split a comma delimited string in python. The tricky part for me here is that some of the fields in the data themselves have a comma in them and they are enclosed within quotes (" or ...

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