Re: [Matplotlib-users] Plot data from custom class

[John H. <jd...@gm...>]

On 3/2/07, Christopher Barker <Chr...@no...> wrote:

> This sounds like EXACTLY the type of object that the array interface is
> supposed to support. So what you need to do is give your object an array
> interface:
>
> http://numpy.scipy.org/array_interface.shtml

I still am not able to make my mock-up custom python class work as I
would like with asarray (though it works with "list").  What am I
missing?  The way I read it this appears to be in support of extension
code that wants to expose the array interface, but I have a python
object that acts like a sequence (am I missing some important method)
that wants to work properly with numpy.asarray


class C:
    def __init__(self):
        self._data = (1,2,3,4,5)

    def __iter__(self):
        for i in self._data:
            yield i
        return

    def __getitem__(self, i):
        return self._data[i]

    def __getslice__(self, i, j):
        return self._data[i:j]

    def __len__(self):
        return len(self._data)

    def __array_interface__(self):
        return dict(
            shape=(len(self._data),),
            typestr='f',
            version=3)

import numpy
c = C()
print numpy.asarray(c)
#for i in c:
#    print i