Python, strings, unicode characters

Question

comp/INFO_MAP_ECE/101102.1.119

This string is the output of a CPU but there are always special/non-printable characters after the number and my aim is to obtain the number excluding the text before it and special/non-printable after it. I am trying the split method but am not sure what to use for special/non-printable characters. Can anyone please suggest something? It would be a great help. thanks.

I suggest you show us the code that you use to extract the text — David Heffernan
– David Heffernan, Commented Sep 7, 2011 at 13:05
If one of the answers you got solved your problem, please accept it by clicking on the check mark. — andronikus
– andronikus, Commented Sep 27, 2011 at 3:10

andronikus · Accepted Answer · 2011-09-07 19:31:18Z

3

Assuming your output always looks something like what you showed, you can use a regular expression:

numPattern = r'/([\d.]+)'
output = 'comp/INFO_MAP_ECE/101102.1.119'

m = re.search(numPattern, output)

if m: #If a match was found
  numString = m.group(1)  #Extracts the first group surrounded by ()
  #etc

The pattern here looks for a /, then some numbers and periods, then anything, and extracts just the numbers and periods. This should work as long as you're always getting a string that matches that description.

HTH!

edited Sep 7, 2011 at 19:31

answered Sep 7, 2011 at 13:12

andronikus

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3 Comments

ovgolovin Over a year ago

As I know . doesn't have to be escaped in a character class. So, instead of [\d\.]+', the pattern should be [\d.]+'.

ovgolovin Over a year ago

Also, I don't understand, what .* is doing at the end of the pattern.

andronikus Over a year ago

Changed. I didn't know about .s in character classes, so that's good to know. I'm not entirely sure what the .* was doing there either. Maybe I was thinking about the non-printable characters?

Jordan Bouvier · Accepted Answer · 2011-09-07 19:44:51Z

1

Is the number always the same length? If so you could just slice the string.

'comp/INFO_MAP_ECE/101102.1.119'[18:30]

answered Sep 7, 2011 at 19:44

Jordan Bouvier

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1 Comment

Jordan Reiter Over a year ago

Not a good idea. Even if the number is the same length now, it may not always be. Also becomes pretty onerous to maintain. This is precisely what regexes were made for.

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