[Numpy-discussion] numpy requires tuples for indexing where Numeric allowed them?
Thu Jun 7 14:16:00 CDT 2007
Jim Kleckner wrote:
> I'm fighting conversion from Numeric to numpy.
> One change that doesn't seem documented is that I used to be able to
> select items using lists and now it seems that I have to convert them to
> tuples. Is that correct and is there a function buried in there that
> will accept a list for indices?
The problem is that with the introduction of arbitrary indexing
(indirect indexing), lists are treated as sequences of indices instead
of index numbers.
There is a bit of logic inserted for backward compatibility, but it
What is the code that you are having trouble with?
> Any reason that item() can't take a list?
Not that I can think of. It could probably be updated to take a list.
> The weird thing is that it doesn't blow up right away when a list is
> passed in an array ref but rather returns something I don't expect.
Right, this is the indirect referencing feature that NumPy now supports.
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