in does not work as expected with HDUList

[astrofrog]

In the following example:

In [1]: from astropy.io import fits

In [2]: hdulist = fits.HDUList()

In [3]: hdulist.append(fits.ImageHDU(name='a'))

In [4]: hdulist['a']
Out[4]: <astropy.io.fits.hdu.image.PrimaryHDU at 0x102b64e80>

In [5]: 'a' in hdulist
Out[5]: False

I would expect 'a' in hdulist to return True

cc @embray

[embray]

I guess that should work (and should for any of the ways of indexing an HDU, i.e. (name, extver) or (name, extver, extlvl) tuples as well.

[kgullikson88]

I just implemented this in a fork of astropy. I'm not really familiar with github; how do I make a pull request and attach it to this issue?

[astrofrog]

@kgullikson88 - thanks for working on this! You need to push your changes to a branch in your fork, and on github you can go to your fork, change branch, and click on the green button on the left of the branch list to create a pull request. Don't worry about attaching it to this issue, you can just refer to this issue.

[embray]

Fixed--thanks @kgullikson88 !