Can regular expressions compare file names to one another. It seems RE can only compare with input i give it, while I want it to compare amongst itself and give me matches if the first x characters are similiar.
Do you have to use regular expressions?
If you know the number of characters to match can't you just compare slices?
In [1]: f1,f2='cccat','cccap'
In [2]: f1[:3] Out[2]: 'ccc'
In [3]: f1[:3]==f2[:3] Out[3]: True
It seems to me you just have to compare each file to the next one (after having sorted your list).
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