fitsio

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Feature request: allow setting the FPACK dither seed

2

Hi, I'm trying to make it so my code writes bit-identical outputs every time it runs, but I'm using the compression schemes that do the subtractive dither thing, so there...

dstndstn

Reading very large .fits.gz file fails.

6

We (@ekitanidis) were trying to read a 2.1GB .fits.gz file (legacy survey DR8 annotated CCD file, prerelease). The read operation failed with cfitsio internal error. Seems to be when it...

rainwoodman

An fpacked image with keywords is failing to allow me to overwrite it. The example image is at BNL here: ``` /gpfs/mnt/gpfs02/astro/workarea/beckermr/des-y6-analysis/2022_02_04_imsims_tests_desy6/sim_outputs/des-pizza-slices-y6-v12/DES2359-6539/sources-r/OPS/finalcut/Y5A1/r3515/20170821/D00670401/p01/red/bkg/D00670401_r_c56_r3515p01_bkg.fits.fz ``` I see the same mean in the...

beckermr

Suggestion: Emit warning when fitsio.write doesn't overwrite a file since clobber=False.

4

I've been bitten by this fitsio feature multiple times: When calling `fitsio.write(file_name, data)`, if the file exists already, fitsio will append a new extension rather than overwrite the file. I...

rmjarvis

calling len() adds a HDU to an empty FITS

3

Calling `len()` on an empty (i.e. newly created) FITS adds a HDU: ```py >>> fits = fitsio.FITS('new.fits', 'rw') >>> len(fits) 1 >>> 0 in fits True >>> fits[-1] file: test.fits...

ntessore

pip install fitsio fails on up-to-date Microsoft Windows 10

8

Hello. I saw an earlier issue regarding pip install, but my issue appears to be different. I am using python 3.9. I hope someone is able to provide assistance; let...

jvickroy

Can I use fitsio to loop quickly over 20k small fits-file?

1

Hi, I need to extract information from a few columns in ~20k different fits files. Each file is relatively small, ~0.2MB. I have been doing this so far with a...

Nestak2

move to cfitsio 4?

3

We gotta keep up. I wonder what they changed...

beckermr

weird error with big columns

1

I cannot tell if this is a cfitsio error or something else, but here it is: ``` import fitsio import numpy as np d = np.ones(1, dtype=[("blah", "S35000")]) fitsio.write("test.fits", d,...

beckermr

Error reading header by extension with duplicate EXTNAME headers

1

Hi Erin, With fitsio 1.1.4 (and python 3.8.10), I'm trying to read an image header from the Canada-France-Hawaii Telescope's MegaPrime camera, and I'm getting weird behavior. There are a couple...

dstndstn