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Date: Mon, 27 Feb 2012 06:00:22 -0800 (PST)
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:20938

=E5=9C=A8 2012=E5=B9=B42=E6=9C=8826=E6=97=A5=E6=98=9F=E6=9C=9F=E6=97=A5UTC+=
8=E4=B8=8B=E5=8D=889=E6=97=B600=E5=88=8631=E7=A7=92=EF=BC=8CChris Angelico=
=E5=86=99=E9=81=93=EF=BC=9A
> On Sun, Feb 26, 2012 at 11:04 PM, Peter Otten <__peter__@web.de> wrote:
> > This is however a bit errorprone. If you accidentally write the loading=
 code
> > as
> >
> > fruit, beverages, vegetables =3D pickle.load(f)
> >
> > you'll end up drinking potatoes.
>=20
> You mean vodka? :)
>=20
> Additionally, you'll get a weird crash out of your program if load()
> returns something other than a sequence of length 3. Remember,
> everything that comes from outside your code is untrusted, even if you
> think you made it just two seconds ago.
>=20
> Of course, sometimes that exception is absolutely correct. If you wrap
> all this in an exception handler that gives some reasonable behaviour
> - which might even be "terminate the program with a traceback", which
> is the default - then it's fine to let it throw on failure, and
> anything else is just a waste of effort. But for maximum
> extensibility, you would want to make it so that you can add more
> elements to what you save without your code breaking on an old save
> file - and that's where the dictionary is far better. A slight tweak,
> though:
>=20
> data =3D pickle.load(f)
> fruit =3D data.get("fruit",[])
> beverages =3D data.get("beverages",[])
> vegetables =3D data.get("vegetables",[])
>=20
> With this, you guarantee that (a) unrecognized keys will be safely
> ignored, and (b) absent keys will quietly go to their given defaults.
>=20
> ChrisA

I love python for pickle and zip lib build in. I write programs that=20
stay in the L1 or L2 cache of the CPU > 97% percent of chance of nontrivial=
 executions.