[AstroPy] Query about Table.add_row() method for masked tables

[Erik Bray]

On 10/1/2015 4:30 PM, Josh Tan wrote:
> Hello,
>
> I have been trying to use astropy tables and have found that you cannot add a
> `None` row with a mask. While I can go and add np.zeroes by hand, it’s a bit
> annoying to me that it behaves this way. (See examples below.)

Hi Josh,

There definitely seems to be some conflict between add_row(None) and 
add_row(..., mask=...).  It seems to be that the allowed formats for the mask 
value aren't really compatible with the add_row(None) syntax.  I think that 
could be fixed--the way you were trying to do it, add_row(None, mask=True), 
makes sense to me.

Erik

> In [69]:
>
> t  =Table([[1], [2]],names=('a','b'),masked=True)
>
> t.add_row(None,mask=True)
>
> ---------------------------------------------------------------------------
> TypeError                                  Traceback (most recent call last)
> <ipython-input-69-4b6f404ff930>  in<module>() 1 t=  Table([[1],  [2]],  names=('a',  'b'),  masked=True)
> ----> 2t.add_row(None,  mask=True)
>
> /Users/joshuaschroeder/Documents/Ureka/python/lib/python2.7/site-packages/astropy/table/table.pyc  inadd_row(self, vals, mask) 1623 3 6 9
> 1624          """
> -> 1625self.insert_row(len(self),  vals,  mask)
> 1626
> 1627      def  insert_row(self,  index,  vals=None,  mask=None):
>
> /Users/joshuaschroeder/Documents/Ureka/python/lib/python2.7/site-packages/astropy/table/table.pyc  ininsert_row(self, index, vals, mask) 1674 # that have entries for each table column.
> 1675              if  maskis  not  Noneand  not  _is_mapping(mask):
> -> 1676raise TypeError("Mismatch between type of vals and mask")
> 1677
> 1678              # Now check that the mask is specified for the same keys as the
>
> TypeError: Mismatch between type of vals and mask
>
>
> In [74]:
>
> t  =Table([[1], [2]],names=('a','b'),masked=True)
>
> t.add_row(None,mask=len(t.colnames)*[True])
>
> ---------------------------------------------------------------------------
> TypeError                                  Traceback (most recent call last)
> <ipython-input-74-ae9160dbf05d>  in<module>() 1 t=  Table([[1],  [2]],  names=('a',  'b'),  masked=True)
> ----> 2t.add_row(None,  mask=len(t.colnames)*[True])
>
> /Users/joshuaschroeder/Documents/Ureka/python/lib/python2.7/site-packages/astropy/table/table.pyc  inadd_row(self, vals, mask) 1623 3 6 9
> 1624          """
> -> 1625self.insert_row(len(self),  vals,  mask)
> 1626
> 1627      def  insert_row(self,  index,  vals=None,  mask=None):
>
> /Users/joshuaschroeder/Documents/Ureka/python/lib/python2.7/site-packages/astropy/table/table.pyc  ininsert_row(self, index, vals, mask) 1674 # that have entries for each table column.
> 1675              if  maskis  not  Noneand  not  _is_mapping(mask):
> -> 1676raise TypeError("Mismatch between type of vals and mask")
> 1677
> 1678              # Now check that the mask is specified for the same keys as the
>
> TypeError: Mismatch between type of vals and mask
>
>
>
>
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