Yeah, I think we may need to write some custom wrapper functions for the functions we use which don't call __new__. I don't really see another way around it since by the time __array_finalize__ gets called there are no units and the problems with mixed units.

bryce

Pierre GM wrote:
On Thursday 29 March 2007 13:47:48 Bryce Hendrix wrote:
  
doh! I followed the example on the Wiki which does not define the class
attribute in the class scope, but in __new__. Adding the declaration to
the class scope seems to work.
    

Yeah, sorry about that, I really should update this wiki page. I gonna try 
later this afternoon/evening.
Glad it works, though.

However, that only part of your problem:
With concatenate, what unit should take precedence ? In your example, 
concatenating unit_ary_1 and unit_ary_2 should give a unit_array w/ meters as 
units. But what if you concatenate unit_1 and unit_3 ? Meters or feet ?

The idea would be to write a custom concatenate function, that would convert 
the units of each argument to the unit of the first one (for example), and 
call numpy.concatenate. Or something like that.
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