[FIXED] ipython, find specific directories

Issue

I do some (beginners) programming in ipython 5.1.0.

There are about 100 directories with names like Mix_XFUEL_0.5_XOXID_0.6_PHI_0.2, only the numbers are changing.

I use fnmatch to read the names into the programm. Now I need all directories, in which the first two numbers (behind XFUEL and XOXID) are identically, like:

Mix_XFUEL_0.5_XOXID_0.5_PHI_0.2
Mix_XFUEL_0.5_XOXID_0.5_PHI_0.4
Mix_XFUEL_0.5_XOXID_0.5_PHI_0.6

but also

Mix_XFUEL_0.6_XOXID_0.6_PHI_0.2
Mix_XFUEL_0.6_XOXID_0.6_PHI_0.4
Mix_XFUEL_0.6_XOXID_0.6_PHI_0.6

I tried:

i = '0.5'  
fnmatch.fnmatch(file, 'Mix_XFUEL_'i'_XOXID_'i'_PHI_*'):  

but it won't work.

How can it be done?

Solution

use regex, 2nd capture group (\1) asserted that it need to match the 1st capture group (\d+(?:\.\d+)?)

(\d+(?:\.\d+)?) match any decimal number or number with decimal points

import re
re.match(r'Mix_XFUEL_(\d+(?:\.\d+)?)_XOXID_(\1)_PHI', infile)

this will match

• "Mix_XFUEL_0.5_XOXID_0.5_PHI_0.2"
• "Mix_XFUEL_0.6_XOXID_0.6_PHI_0.2"
• "Mix_XFUEL_5_XOXID_5_PHI_0.2"

but not

• "Mix_XFUEL_0.5_XOXID_0.6_PHI_0.2"

Answered By - Skycc