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List: python-list
Subject: RE: [path-PEP] Path inherits from basestring again
From: "Tim Golden" <tim.golden () viacom-outdoor ! co ! uk>
Date: 2005-07-29 7:36:10
Message-ID: 9A28C052FF32734DACB0A288A3533991044D2164 () vogbs009 ! gb ! vo ! local
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[Tony Meyer]
|
| [Tim Golden]
| > Well, I actually had some correspondence with Jason on this
| > very subject a year or so ago:
| [...]
| > Obviously, I don't know how much weight Jason's original
| > ideas have on the prepped-for-syslib module, but it does
| > support what other people have been saying: that the Path
| > should behave like a string where a string is expected.
|
| Was that the whole email? It certainly adds weight to '+'
| having the normal
| string behaviour, but it didn't really say anything about why
| '/' should be
| a shortcut for join. Do you know if Jason had any reasoning
| for this other
| than laziness <wink>?
|
| =Tony.Meyer
Well, he did add the following paragraph:
<email>
For example: I haven't tried it, but I don't think the most obvious
two-line fix will necessarily work. If you change __add__ to call
os.path.join(), you'll likely get infinite recursion, because os.path.join()
probably uses + to do its work. Of course this is pretty easy to work
around; call it three lines.
</email>
which might explain why he *didn't* use __add__ but doesn't explain
whey he *did* use __div__. (There was more to the original email
but that was more to do with some wild-eyed ideas I'd had about
adding methods for file-locking and share-mounting to the path
object).
FWIW, my own feeling is that / is an awkward fit and relies for
its ease-of-reading on the -- admittedly common but not universal --
use of that symbol as a path separator. I don't feel terribly strongly
about it, but I don't tend to use it in my own code.
TJG
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