[Numpy-discussion] Changes in PyArray_FromAny between 1.5.x and 1.6.x
Mike Hansen
mhansen at gmail.com
Mon May 28 06:15:48 EDT 2012
Hello,
In trying to upgrade NumPy within Sage, we notices some differences in
behavior between 1.5 and 1.6. In particular, in 1.5, we have
sage: f = 0.5
sage: f.__array_interface__
{'typestr': '=f8'}
sage: numpy.array(f)
array(0.5)
sage: numpy.array(float(f))
array(0.5)
In 1.6, we get the following,
sage: f = 0.5
sage: f.__array_interface__
{'typestr': '=f8'}
sage: numpy.array(f)
array(0.500000000000000, dtype=object)
This seems to be do to the changes in PyArray_FromAny introduced in
https://github.com/mwhansen/numpy/commit/2635398db3f26529ce2aaea4028a8118844f3c48
. In particular, _array_find_type used to be used to query our
__array_interface__ attribute, and it no longer seems to work. Is
there a way to get the old behavior with the current code?
--Mike
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