[Python-Dev] A wart which should have been repaired in 3.0? (original) (raw)
"Martin v. Löwis" martin at v.loewis.de
Sun Dec 28 21:21:25 CET 2008
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I'm all for breaking backwards compatibility when it allows some genuine improvements that would otherwise be impossible, but in this particular case a little API bloat seems like the least of the available evils :)
I don't think any change is necessary. os.path.commonprefix works just fine on path components:
py> p = ["/usr/bin/ls", "/usr/bin/ln"] py> os.path.commonprefix([f.split('/') for f in p]) ['', 'usr', 'bin'] py> p.append("/usr/local/bin/ls") py> os.path.commonprefix([f.split('/') for f in p]) ['', 'usr']
Of course, using it that way would require a library function that reliably splits a path into components; I think one would have to do abspath on arbitrary inputs.
Regards, Martin
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