[Numpy-discussion] Recarray comparison and byte order
Matthew Brett
matthew.brett@gmail....
Sun Nov 1 00:45:09 CDT 2009
Hi,
>> c = a.byteswap().newbyteorder()
>> c == a
>
> In the last two lines, a variable "c" is assigned to a modified "a". The
> next line tests (==) to see if "c" is the same as (==) the unmodified "a".
> It isn't, because "c" is the modified "a". Hence, "False".
Sorry, I wasn't very clear - the stuff in brackets is what gets echoed
to the terminal, and '==' was deliberate.
The field values in 'a' and 'c' are all equal, so I was expecting what
I got for comparing - for example 'a' to a copy of itself. Non-record
arrays also behave as I expected after byteswapping:
In [2]: a = np.arange(3, dtype='u2')
In [3]: c = a.byteswap().newbyteorder()
In [4]: a == c
Out[4]: array([ True, True, True], dtype=bool)
Best,
Matthew
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