"M.-A. Lemburg" <mal@lemburg.com> writes:
> > This is a bit unfriendly though:
> >
> > >>> "bobbins".encode("gzip")
> > Traceback (most recent call last):
> > File "<stdin>", line 1, in ?
> > File "/usr/local/src/python/dist/build/Lib/encodings/__init__.py", line 59, in search_function
> > raise SystemError,\
> > SystemError: module "encodings.gzip" failed to register
> >
> > I thought SystemErrors shouldn't ever happen (isn't it what gets
> > raised for an illegal opcode, for example?).
>
> This is due to the zlib module not being installed.
No it's not, actually. I *thought* I was getting the error message
because the zlib encoding doesn't alias itself to gzip (whether it
should or not is another question). But in fact if you specify a
bogus encoding you get a nice error message:
>>> "bobbins".encode("nonesuch")
Traceback (most recent call last):
File "<stdin>", line 1, in ?
LookupError: unknown encoding
but:
>>> "bobbins".encode("sys")
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "/usr/local/src/python/dist/build/Lib/encodings/__init__.py", line 59, in search_function
raise SystemError,\
SystemError: module "encodings.sys" failed to register
I have to admit I don't really know what's going on here, but the
error is just confusing.
> The reason for the search function in encodings/__init__.py raising
> a SystemError is that it did find a module named gzip, but this
> module does not export the needed registration API getregentry().
Yep.
> Perhaps it should just raise a LookupError instead, though...
Might be easiest.
> > urlencode would be nice. Maybe re.escape, too. html entities?
> > That's probably a bigger can of worms, but
> >
> > print "<p>%s</p>"%text.encode("html")
> >
> > seems delightfully simpleminded.
>
> Right. That's the idea... volunteers are welcome :-)
Maybe this evening.
> There are lots of those little "escape this, encode that" tasks
> which could benefit from the codec machinery. The ones you
> mention would certainly be good candidates. pickle and marshal
> would also be a good to have wrapped as codecs.
Ooh yes, hadn't thought of them.
'YW5vdGhlci1mdW4tdG95\n'.decode("base64")-ly y'rs
M.
--
There's an aura of unholy black magic about CLISP. It works, but
I have no idea how it does it. I suspect there's a goat involved
somewhere. -- Johann Hibschman, comp.lang.scheme
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