Astropy: Header.set can create empty valued keywords

Created on 27 Nov 2019  ·  3Comments  ·  Source: astropy/astropy

I don't know if this is a bug or is expected, but in astropy 3.0 this:

from astropy.io import fits
hdr = fits.header()
hdr.set('A')
print(hdr)

gets you this

A = ' '
END

but in 3.2 you get this

A = 
END

with no value. Is this valid FITS?

EDIT: Fixed code

Close? io.fits question
Source
picture sergiopasra

All 3 comments

Hmm... I see that in 4.1dev too. Do you want to git bisect and see which commit was the culprit?

pllim picture pllim on 27 Nov 2019

Yes, this is valid FITS, it creates an undefined card : #8572

saimn picture saimn on 27 Nov 2019
👍1

Yes, the commit is 545f488cbb4a5ccca908bffeb90bc29ad41bd9c1
I see that before this commit a value of None in this function was mapped to ' '
It's my understanding that this is the intended behavior, so this can be closed.

sergiopasra picture sergiopasra on 27 Nov 2019
👍1
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