Question

I have file names that are in this format:

anytext_NUMBER_svm.pkl

I need to loop thourgh all files in a dir and file files that look like this:

file1.txt
file2.txt
anytext_1_svm.pkl
anytext_2_svm.pkl
anytext_3_svm.pkl

The matched files will be this:

anytext_1_svm.pkl
anytext_2_svm.pkl
anytext_3_svm.pkl

How to I use python regex to do this?

Answer 1

This regex shoud solve your problems:

>>> import re
>>> regex = re.compile(r'.+_\d+_svm\.pkl')
>>> regex.search('anytext_1_svm.pkl') != None
True

But you should definitely take a look at the documentation: http://docs.python.org/library/re.html