I think Nick's solution is "Don't let the best be the enemy of the good"
Had this been caught before 3.0 release it might be a different solution Let's just add a new function that works "correctly" Martin, it seems to me that a path. method shouldn't require me to pass path components but instead should accept a "path" as its input (or in this case multiple paths). The current usage feels like a string method to me. Not saying it's not useful but it isn't "intuitive". For those that prefer not to add functions all willy-nilly, would it not be better to add a "delimiter" keyword that defaults to False? Then "delimiter=False" will function with the current functionality unchanged while os.path.commonprefix(["bob/export/home", "bob/etc/passwd"], delimiter = "/") would properly return 'bob/'
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