turning single cube into a cubelist

[cpelley]

This splits the outer dimension of the cube, returning a cubelist not of len 1 (len of 1 is what we would expect)

>>> import iris.tests.stock as stock
>>> simple = stock.lat_lon_cube()
>>> simple
<iris 'Cube' of unknown / unknown (latitude: 3; longitude: 4)>
>>> iris.cube.CubeList(simple)
[<iris 'Cube' of unknown / unknown (longitude: 4)>,
<iris 'Cube' of unknown / unknown (longitude: 4)>,
<iris 'Cube' of unknown / unknown (longitude: 4)>]

[cpelley]

A workaround for now is to simply append to an empty cubelist, like so:

>>> ncube = iris.cube.CubeList()
>>> ncube.append(simple)
>>> ncube
[<iris 'Cube' of unknown / unknown (latitude: 3; longitude: 4)>]

I'm happy to be assigned to this issue and look into fixing it

[pelson]

What's the question/problem? This functionality should no longer work as of #273.

[cpelley]

I can confirm this occurs on the latest master, but this then is likely to have cause from #273 deprecating the current behaviour. But then putting a cube into a cubelist should not be calling this deprecated behaviour.

[rhattersley]

... this then is likely to have cause from #273 deprecating the current behaviour.

Not sure what you mean by that, but here's what I see:

>>> iris.cube.CubeList(simple)
/data/local/ithr/git/iris/lib/iris/cube.py:1360: UserWarning: Cube iteration has been deprecated: please use Cube.slices() instead.
  warnings.warn('Cube iteration has been deprecated: '
[<iris 'Cube' of unknown / unknown (longitude: 4)>,
<iris 'Cube' of unknown / unknown (longitude: 4)>,
<iris 'Cube' of unknown / unknown (longitude: 4)>]

i.e. Iterating over a Cube is deprecated and will eventually be removed.

[cpelley]

... this then is likely to have cause from #273 deprecating the current behaviour.

"cause" is prob a poor choice of words, what I meant is that the current behaviour, where it iterates through the cube will be removed by #273, which will then stop the unexpected behaviour observed from occurring.

I'm happy that this issue has already been resolved.