On Tue, Apr 23, 2013 at 5:12 PM, Kay F. Jahnke <[email protected]> wrote: > Hi group! > > I stumbled upon a difference in numpypy's ndarray buffer interface. If I > take the address of the data of a slice in numpy, I get a pointer to the > first element in the slice. In numpypy I get a pointer to the data I took > the slice from. I wonder if this is a bug or deliberate? If it's a bug, it's > probably merely an omission of adding the offset to the data pointer. Here's > what I observed:
it's a bug, please file in a bug on bugs.pypy.org so we don't forget (even better submit a patch, but a bug is good too) Cheers, fijal > > $ pypy > Python 2.7.3 (aa7b56060ddd, Apr 22 2013, 22:03:12) > [PyPy 2.0.0-beta2 with GCC 4.4.3] on linux2 > Type "help", "copyright", "credits" or "license" for more information. > And now for something completely different: ``PyPy 1.2 released - > http://pypy.org/'' >>>>> import numpypy as np >>>>> a=np.zeros(10) >>>>> a.__array_interface__['data'][0] > -1220095968 >>>>> a[2:].__array_interface__['data'][0] > -1220095968 <<<<<<<< same value > > $ python > Python 2.7.3 (default, Apr 10 2013, 05:46:21) > [GCC 4.6.3] on linux2 > Type "help", "copyright", "credits" or "license" for more information. >>>> import numpy as np >>>> a=np.zeros(10) >>>> a.__array_interface__['data'][0] > 162282152 >>>> a[2:].__array_interface__['data'][0] > 162282168 <<<<<<<<<<< different value > > with regards > Kay F. Jahnke > _______________________________________________ > pypy-dev mailing list > [email protected] > http://mail.python.org/mailman/listinfo/pypy-dev _______________________________________________ pypy-dev mailing list [email protected] http://mail.python.org/mailman/listinfo/pypy-dev
