[Numpy-discussion] rank-0 arrays ideas
oliphant at ee.byu.edu
Fri Feb 18 15:05:11 EST 2005
From the current PEP:
The solution proposed by this PEP is to fix the places in Python
that could use rank-0 arrayobjects to allow for them before raising
an exception (this will be in the core after-all).
A Python scalar will never be returned unless explicitly
requested. I think this is the cleanest, easiest to understand
and code for solution. It may require some explicity conversion
to int here and there, but it seems like a case of "explicit is
better than implicit"
- a compromise could be made for OBJECT arrays and
perhaps LONG arrays if needed.
- a special flag could be defined which is the default
when an array of integers is constructed and which when
set rank-0 array returns behave differently.
It is also proposed that slicing, indexing and len() do
not work (i.e. they raise an error) for rank-0 arrays.
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