[MATRIX-SIG] FancyArray

[Janko Hauser]

Hi, I haven't played with it yet, but here is a solution to the
reshape problem.
First, reshape does function here, but returns not an UserArray
object. 

>>> a
UserArray([0, 1, 2, 3, 4, 5, 6, 7, 8])
>>> reshape(a,(3,3))
array([[0, 1, 2],
       [3, 4, 5],
       [6, 7, 8]])

But according to the docs of reshape this is a behavior, which can be
expected in some sense, because reshape returns a copy. reshape is
also not an builtin function, so I see no way to deal with it in the
class itself. But the docs emphasize, that one should use 

a.shape=(3,3) for inplace reshaping. This can be handled by the class
with following method:

    def __setattr__(self,att,value):
	if att == 'shape':
	    self.__dict__['shape']=value
	    self.array.shape=value
	else:
	    self.__dict__[att]=value


>>> c=myUserArray.UserArray(range(9))
>>> c
UserArray
[0 1 2 3 4 5 6 7 8]
>>> c.shape=(3,3)
>>> c
UserArray
[[0 1 2]
 [3 4 5]
 [6 7 8]]
>>> 


If there are some more drawbacks or wishful things for the UserArray
class, please mention it. I see many useful way to use UserArray, so
this class should be as powerful as possible.


__Janko


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