adds read_npz
and write_npz
, convenience wrappers
#46
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these work like
read_npy
andwrite_npy
but write compressed.npz
files instead. I wanted this functionality for writing ephemeral array files to be able to check something later if needed without taking up too much disk space.in comparing to
read_npy
/write_npy
, there is one major difference: since anpz
file can contain multiple named arrays/files, this picks a default name for the single array it writes withwrite_npz
, while allowing the user to specify the name to extract withread_npz
. this may not be the best choice, but it seemed less than ideal to not permit specifying the name inread_npz
, and I wantedwrite_npz
to remain as simple as possible.I picked the default name for
write_npz
based on what numpy does insavez_compressed
("arr_0.npy"). however, I think there is a divergence there. usingnp.load
, you will get a dict-like object that allows you to access the arrays without the.npy
extension (i.e. at keyarr_0
). however, usingNpzReader
, you need to use the fullarr_0.npy
name to retrieve the same array. just wanted to flag as this tripped me up a bit.thanks for your consideration of this pull request.