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Python globで得るファイル名を数字順にする

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環境によっては何もしなくてもglob.globで得られるファイルは数字順であったが、他の環境ではそうでもなくarbitraryであった。

出典:http://stackoverflow.com/questions/12093940/reading-files-in-a-particular-order-in-python
を参考にsortすることで解決する。

import glob 
import re
def numericalSort(value):
    numbers = re.compile(r'(\d+)')
    parts = numbers.split(value)
    parts[1::2] = map(int, parts[1::2])
    return parts
fitsf=sorted(glob.glob('*.fits'), key=numericalSort)
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