-הודעה מקורית-
מאת: [EMAIL PROTECTED] בשם Andreas Kl?ckner
נשלח: ג 25-מרץ-08 06:42
אל: Discussion of Numerical Python
נושא: Re: [Numpy-discussion] __iadd__(ndarrayint, ndarrayfloat)
On Montag 24 M?rz 2008, St?fan van der Walt wrote:
I think this is highly undesirable and should
On Dienstag 25 März 2008, Nadav Horesh wrote:
scalars are immutable objects in python. Thus the += (and alike) are fake:
Again, thanks for the explanation. IMHO, whether or not they are fake is an
implementation detail. You shouldn't have to know Python's guts to be able to
use Numpy
Andreas Klöckner wrote:
[snip]
a += 3 is really equivalent to a = a+3.
Except when it isn't.
right -- it isn't the same. In fact, if I were king (or BDFL), you
wouldn't be able to use += with immutable types, but I'm not ;-)
One of the reasons the augmented assignment operators where
Hi all,
I just got tripped up by this behavior in Numpy 1.0.4:
u = numpy.array([1,3])
v = numpy.array([0.2,0.1])
u+=v
u
array([1, 3])
I think this is highly undesirable and should be fixed, or at least warned
about. Opinions?
Andreas
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Hi Andreas
On Mon, Mar 24, 2008 at 7:28 PM, Andreas Klöckner
[EMAIL PROTECTED] wrote:
I just got tripped up by this behavior in Numpy 1.0.4:
u = numpy.array([1,3])
v = numpy.array([0.2,0.1])
u+=v
u
array([1, 3])
I think this is highly undesirable and should be fixed, or at
On Montag 24 März 2008, Stéfan van der Walt wrote:
I think this is highly undesirable and should be fixed, or at least
warned about. Opinions?
I know the result is surprising, but it follows logically. You have
created two integers in memory, and now you add 0.2 and 0.1 to both --
not
Andreas Klöckner wrote:
On Montag 24 März 2008, Stéfan van der Walt wrote:
I think this is highly undesirable and should be fixed, or at least
warned about. Opinions?
I know the result is surprising, but it follows logically. You have
created two integers in memory, and now you
On Dienstag 25 März 2008, Travis E. Oliphant wrote:
Question: If it's a known trap, why not change it?
It also has useful applications. Also, it can only happen at with a
bump in version number to 1.1
I'm not trying to make the functionality go away. I'm arguing that
int_array +=
