[AstroPy] help with writing a boolean column with astropy.io.Table

[Aldcroft, Thomas]

Hi Rose,

I'm able to reproduce this and I've confirmed that the test.fits file
output seems to be correct (by reading with an independent FITS reader).
 This would appear to be a bug in FITS reading, though it's just a little
surprising that something so basic as reading a FITS file with a boolean
column could have a bug like this.

I'm opening an astropy github issue on this now.

- Tom


On Thu, Jan 9, 2014 at 11:57 AM, Finn, Rose <rfinn at siena.edu> wrote:

> Hi,
>
> I am trying to write a fits table with astropy.io.Table and am having
> trouble with a boolean array.  Basically, all the values turn out to be
> false, regardless of what the values are in the input array.  I have
> included an example below - any help would be appreciated!  I am trying to
> avoid writing the table with astropy.io.fits because it is cumbersome.
>  Everything works fine with floating point arrays.
>
> Thanks,
> Rose
>
>
> from astropy.io import Column
>
> from astropy.table import Table
>
> from astropy.table import Column
>
> newcol=Column(data=np.ones(10),name='test',dtype='bool')
>
> dt=Table()
>
> dt.add_column(newcol)
>
> dt.write('test.fits')
>
> dat=dt.read('test.fits')
>
> In [*48*]: dat['test']
>
> Out[*48*]:
>
> <Column name='test' unit=None format=None description=None>
>
> array([False, False, False, False, False, False, False, False, False,
> False], dtype=bool)
>
>
> In [*45*]: newcol
>
> Out[*45*]:
>
> <Column name='test' unit=None format=None description=None>
>
> array([ True,  True,  True,  True,  True,  True,  True,  True,  True,
> True], dtype=bool)
>
>
> --
> Rose A. Finn
> Department of Physics & Astronomy
> Siena College
> Loudonville, NY  12211
>
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>
>
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