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pythonironpython

Get certain items based on their formatting

I have a list of values, some are numeric only, others made up of words, others a mix of the two. I would like to select only those items composed by the combination number, single letter, number.

let me explain, this is my list of values

l = ['980X2350', 'DO_UN_HPL_Glas_Links', 'DO_UN_HPL_Glas_Rechts',
     '930x2115', 'DO_UN_HPL_Links', 'DO_UN_HPL_Rechts', '830X2115',
     'Deuropening', 'BF_32_Tourniquets_dubbeledeur_Aluminium']

I'd like to just get back:

['980X2350', '930x2115', '830X2115']
Solution

  • Assuming a list of strings as input, you can use a regex and a list comprehension:

    l = ['980X2350', 'DO_UN_HPL_Glas_Links', 'DO_UN_HPL_Glas_Rechts',
     '930x2115', 'DO_UN_HPL_Links', 'DO_UN_HPL_Rechts', '830X2115',
     'Deuropening', 'BF_32_Tourniquets_dubbeledeur_Aluminium']
import re
regex = re.compile('\d+x\d+', flags=re.I)

out = [s for s in l if regex.match(s.strip())]

    output:

    ['980X2350', '930x2115', '830X2115']