Extracting text from alphanumeric strings

[Clemence]

Hi There.

I'm trying to write a code that reads the filenames of objects of the form "gal_z7.25.sae" and "gal_z0.02563.sae" and stores the decimal digit parts ONLY to a list.

So far I have the following:

import glob
import sys, os
 
#Open folder with files
filelist = glob.glob("/home/clemence/Desktop/testing/*.sae")
 

printing filelist gives me the following:

/home/clemence/Desktop/testing/gal_z0.275.sae'

And each item in filelist contains the numbers I need. All I need is a way of ignoring the text and taking only the numbers into another list.

Please help

[bvdet]

This can be done with a regular expression.

>>> results = ["gal_z7.25.sae", "gal_z0.02563.sae"]
>>> import re
>>> patt = re.compile(r"[^0-9.]+([0-9]+.[0-9]+)")
>>> for item in results:
...     print patt.match(item).group(1)
...     
7.25
0.02563
>>>