python open file matching pattern excluding substring

Question

I need to open some files inside a folder in python

Say, I have the following files in the folder:

text_pbs.fna
text_pdom_fo_oo.fna
text_pdom_fo_oo_aa.fna
text_pdom_fo_oo.ali
text_pdom_ba_ar.fna
text_pdom_ba_ar_aa.fna
text_pdom_ba_ar.ali
text_pdom_ba_az.fna
text_pdom_ba_az_aa.fna
text_pdom_ba_az.ali

I want to open:

text_pdom_fo_oo.fna
text_pdom_ba_ar.fna
text_pdom_ba_az.fna

only.

I tried with glob:

glob.glob('*_pdom_*[^aa].fna')

But it doesn't work. Many thanks to point out the problem in the above pattern. Is there any other work around for this?

It's not taking any file. The above pattern is not matching anything. — Rimjhim Roy Choudhury
– Rimjhim Roy Choudhury, Commented Jul 8, 2015 at 13:56
Ok, on testing, it would appear that glob doesn't handle the ^ part of range matches. — CrazyCasta
– CrazyCasta, Commented Jul 8, 2015 at 14:00
Perhaps, you can do it with *_pdom_*[a-z][b-z].fna or *_pdom_*[b-z].fna. — Wiktor Stribiżew
– Wiktor Stribiżew, Commented Jul 8, 2015 at 14:08

aTben0 · Accepted Answer · 2015-07-08 14:09:44Z

5

The ^ is not handled and must be replaced by !, You should try this code:

import glob
glob.glob('*_pdom_*[!aa].fna')

gives the result:

['text_pdom_fo_oo.fna','text_pdom_ba_ar.fna','text_pdom_ba_az.fna']

edited Jul 8, 2015 at 14:09

answered Jul 8, 2015 at 14:05

aTben0

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1 Comment

CrazyCasta Over a year ago

Might as well drop the second a in the brackets though since it doesn't do anything.

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