Re: Elementwise -//- first release -//- Element-wise (vectorized) function, method and operator support for iterables in python.

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From	Robert Kern <robert.kern@gmail.com>
Subject	Re: Elementwise -//- first release -//- Element-wise (vectorized) function, method and operator support for iterables in python.
Date	Wed, 21 Dec 2011 16:29:33 +0000
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On 12/21/11 3:15 PM, Nathan Rice wrote:

>> Incidentally, displaying an ElementwiseProxy instance doesn't go down
>> well with iPython:
>>
>> In [1]: from elementwise import *
>>
>> In [2]: e = ElementwiseProxy(['one','two','three'])
>>
>> In [3]: e
>> Out[3]: ERROR: An unexpected error occurred while tokenizing input
>> The following traceback may be corrupted or invalid
>> The error message is: ('EOF in multi-line statement', (6, 0))
>
> I love IPython, but it has had known problems with iterators for
> years.  A long time ago, I agonized over what I thought was a bug in
> my code where itertools.count would skip numbers in IPython, but my
> unit tests all passed.  Everything should work fine if you tuple() it
> first.

This is a different problem, actually. The problem is that the recently added 
(by me, actually) pretty-printing system tries to dispatch based on the type. In 
order to handle old-style classes, it checks for the type using .__class__ 
first. ElementProxy's __getattribute__() gets in the way here by returning a 
generator instead of the ElementProxy class.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco

Thread

Re: Elementwise -//- first release -//- Element-wise (vectorized) function, method and operator support for iterables in python. Nathan Rice <nathan.alexander.rice@gmail.com> - 2011-12-20 19:24 -0500
  Re: Elementwise -//- first release -//- Element-wise (vectorized) function, method and operator support for iterables in python. alex23 <wuwei23@gmail.com> - 2011-12-20 20:27 -0800
    Re: Elementwise -//- first release -//- Element-wise (vectorized) function, method and operator support for iterables in python. Nathan Rice <nathan.alexander.rice@gmail.com> - 2011-12-21 10:15 -0500
    Re: Elementwise -//- first release -//- Element-wise (vectorized) function, method and operator support for iterables in python. Robert Kern <robert.kern@gmail.com> - 2011-12-21 16:29 +0000
    Re: Elementwise -//- first release -//- Element-wise (vectorized) function, method and operator support for iterables in python. Nathan Rice <nathan.alexander.rice@gmail.com> - 2011-12-21 11:43 -0500

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