[Python-Dev] C basetype mapping protocol difference between 2.2.1 and 2.3

[Guido van Rossum]

> Doesn't the current wrapper narrow the acceptable definitions for 
> _ndarray_subscript?  The reason I noticed this is that my 2.2.1 code 
> raises an exception:
> 
>  >>> import numarray
>  >>> a=numarray.arange(10)
>  >>> a
> Traceback (most recent call last):
> File "<stdin>", line 1, in ?
> File "/home/jmiller/lib/python2.2/site-packages/numarray/numarray.py", 
> line 622, in __repr__
> MAX_LINE_WIDTH, PRECISION, SUPPRESS_SMALL, ', ', 1)
> File "/home/jmiller/lib/python2.2/site-packages/numarray/arrayprint.py", 
> line 156, in array2string
> separator, array_output)
> File "/home/jmiller/lib/python2.2/site-packages/numarray/arrayprint.py", 
> line 112, in _array2string
> max_str_len = max(len(str(max_reduce(data))),
> File "/home/jmiller/lib/python2.2/site-packages/numarray/ufunc.py", line 
> 759, in reduce
> r = self.areduce(inarr, dim, outarr)
> File "/home/jmiller/lib/python2.2/site-packages/numarray/ufunc.py", line 
> 745, in areduce
> _outarr1 = self._cumulative("reduce", _inarr, _outarr0)
> File "/home/jmiller/lib/python2.2/site-packages/numarray/ufunc.py", line 
> 653, in _cumulative
> toutarr = self._reduce_out(inarr, outarr, outtype)
> File "/home/jmiller/lib/python2.2/site-packages/numarray/ufunc.py", line 
> 591, in _reduce_out
> toutarr = inarr[...,0].copy().astype(outtype)
> TypeError: an integer is required

I guess that means it's going through the *sequence* getitem, not the
*mapping* getitem.  Have you tried leaving the sequence getitem slot
NULL, and doing everything through your mapping getitem slot?  That
should work in 2.2.

--Guido van Rossum (home page: http://www.python.org/~guido/)