[AstroPy] Opening file in PyFits, works in v2.4, not in v3.0.6
embray at stsci.edu
Tue Apr 3 13:20:41 EDT 2012
On 04/03/2012 12:07 PM, Wolfgang Kerzendorf wrote:
> Hey guys,
> I would have it the other way round: Always raises an exception - except when specifically asked not to, then it will just warn.
> I think the algorithms in fitsverify are there to ensure the integrity of the data. If it doesn't comply - the integrity of the data can not be guaranteed (in this case, the integrity is fine, it's just a bad implementation of the fits standard on the telescopes end afaict). Other data formats do similar things: zip files do not decompress if the CRC doesn't match.
> My 2 cents,
Part of me agrees with this in principle, but in practice it just
wouldn't work. It's like how part of me wishes that whenever a web
browser hits some malformed or invalid HTML it would just throw up an
error and refuse to render the page.
But it's a good thing that web browsers *don't* do that, as such
behavior would have severely hindered the adoption and growth of the
web. I think that FITS, for better or for worse, needs to be treated a
little like HTML in that respect.
In particular, it shouldn't throw up errors when it's fairly unambiguous
what was *meant*. There's absolutely nothing about the "spaces for
padding" requirement that affects parsing of the header--as long as the
header ends on the right alignment that's all that matters.
I already have a fix in git (and subversion as soon as a I `git svn
dcommit`) for this issue. So I'll try to slip that in to the 3.0.7
release, which I hope to get done today or tomorrow.
Incidentally, PyFITS has no problem with the invalid apostrophe in the
origin keyword. Maybe it should say something about that and consider
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