ó šßÈ[c@`sUddlmZmZmZmZddlmZdgZdefd„ƒYZ dS(i(tabsolute_importtdivisiontprint_functiontunicode_literalsi(tloguNDSlicingMixintNDSlicingMixincB`s;eZdZd„Zd„Zd„Zd„Zd„ZRS(uÒMixin to provide slicing on objects using the `NDData` interface. The ``data``, ``mask``, ``uncertainty`` and ``wcs`` will be sliced, if set and sliceable. The ``unit`` and ``meta`` will be untouched. The return will be a reference and not a copy, if possible. Examples -------- Using this Mixin with `~astropy.nddata.NDData`: >>> from astropy.nddata import NDData, NDSlicingMixin >>> class NDDataSliceable(NDSlicingMixin, NDData): ... pass Slicing an instance containing data:: >>> nd = NDDataSliceable([1,2,3,4,5]) >>> nd[1:3] NDDataSliceable([2, 3]) Also the other attributes are sliced for example the ``mask``:: >>> import numpy as np >>> mask = np.array([True, False, True, True, False]) >>> nd2 = NDDataSliceable(nd, mask=mask) >>> nd2slc = nd2[1:3] >>> nd2slc[nd2slc.mask] NDDataSliceable([3]) Be aware that changing values of the sliced instance will change the values of the original:: >>> nd3 = nd2[1:3] >>> nd3.data[0] = 100 >>> nd2 NDDataSliceable([ 1, 100, 3, 4, 5]) See also -------- NDDataRef NDDataArray cC`s=|jjdkr!tdƒ‚n|j|ƒ}|j|S(Nuscalars cannot be sliced.((tdatatshapet TypeErrort_slicet __class__(tselftitemtkwargs((s>lib/python2.7/site-packages/astropy/nddata/mixins/ndslicing.pyt __getitem__8scC`sni}|j||d<|j|ƒ|d<|j|ƒ|d<|j|ƒ|d<|j|d<|j|d<|S(uÍCollects the sliced attributes and passes them back as `dict`. It passes uncertainty, mask and wcs to their appropriate ``_slice_*`` method, while ``meta`` and ``unit`` are simply taken from the original. The data is assumed to be sliceable and is sliced directly. When possible the return should *not* be a copy of the data but a reference. Parameters ---------- item : slice The slice passed to ``__getitem__``. Returns ------- dict : Containing all the attributes after slicing - ready to use them to create ``self.__class__.__init__(**kwargs)`` in ``__getitem__``. udatau uncertaintyumaskuwcsuunitumeta(Rt_slice_uncertaintyt _slice_maskt _slice_wcstunittmeta(R R R ((s>lib/python2.7/site-packages/astropy/nddata/mixins/ndslicing.pyR As  cC`sJ|jdkrdSy|j|SWntk rBtjdƒnX|jS(Nuuncertainty cannot be sliced.(t uncertaintytNoneRRtinfo(R R ((s>lib/python2.7/site-packages/astropy/nddata/mixins/ndslicing.pyRbs cC`sJ|jdkrdSy|j|SWntk rBtjdƒnX|jS(Numask cannot be sliced.(tmaskRRRR(R R ((s>lib/python2.7/site-packages/astropy/nddata/mixins/ndslicing.pyRms cC`sJ|jdkrdSy|j|SWntk rBtjdƒnX|jS(Nuwcs cannot be sliced.(twcsRRRR(R R ((s>lib/python2.7/site-packages/astropy/nddata/mixins/ndslicing.pyRvs (t__name__t __module__t__doc__RR RRR(((s>lib/python2.7/site-packages/astropy/nddata/mixins/ndslicing.pyR s + ! N( t __future__RRRRtRt__all__tobjectR(((s>lib/python2.7/site-packages/astropy/nddata/mixins/ndslicing.pyts"