[Numpy-discussion] a.squeeze() for 1d and 0d arrays
Ed Schofield
schofield at ftw.at
Sat May 20 04:51:01 EDT 2006
Hi all,
I've discovered a bug in my SciPy code for sparse matrix slicing that
was caused by the following behaviour of squeeze():
>>> a = array([3]) # array of shape (1,)
>>> type(a.squeeze())
<type 'int32scalar'>
That is, squeezing a 1-dim array returns an array scalar. Could we
change this to return a 0-dim array instead?
Another related question is this:
>>> b = array(3) # 0-dim array
>>> type(a.squeeze())
<type 'int32scalar'>
I find this behaviour surprising too; the docstring claims that squeeze
eliminates any length-1 dimensions, but a 0-dimensional array has shape
(), without any length-1 dimensions. So shouldn't squeeze() leave
0-dimensional arrays alone?
-- Ed
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