Re: [Numpy-discussion] Making datetime64 timezone naive

2015-10-17 Thread Chris Barker
On Fri, Oct 16, 2015 at 10:19 AM, Alexander Belopolsky wrote: > Since Guido hates leap seconds, PEP 495 is silent on this issue, but > strictly speaking UTC leap seconds are "folds." AFAICT, a strictly POSIX > system must repeat the same value of time_t when a leap second is >

Re: [Numpy-discussion] [SciPy-Dev] Setting up a dev environment with conda

2015-10-17 Thread Nathaniel Smith
Hi Luke, For day-to-day development and testing of numpy, I don't bother with either inplace builds *or* installing it -- I just use the magical "runtests.py" script that you'll find in the root of your git checkout. E.g., to build and then test the (possibly modified) source in your current

[Numpy-discussion] dot product: large speed difference metween seemingly indentical operations

2015-10-17 Thread Nadav Horesh
The functions dot, matmul and tensordot performs the same on a MxN matrix multiplied by length N vector, but very different if the matrix is replaced by a PxQxN array. Why? In [3]: a = rand(100,3) In [4]: a1 = a.reshape(1000,1000,3) In [5]: w = rand(3) In [6]: %timeit a.dot(w) 100

Re: [Numpy-discussion] Interesting discussion on copyrighting files.

2015-10-17 Thread josef.pktd
On Thu, Oct 15, 2015 at 11:28 PM, Charles R Harris < charlesr.har...@gmail.com> wrote: > Worth a read at A . > Thanks, it is worth a read. Most of the time when I see code copied from scipy or statsmodels, it is properly attributed. But every once in a

Re: [Numpy-discussion] Interesting discussion on copyrighting files.

2015-10-17 Thread Nathaniel Smith
On Sat, Oct 17, 2015 at 10:24 AM, wrote: > > On Thu, Oct 15, 2015 at 11:28 PM, Charles R Harris > wrote: >> >> Worth a read at A > > Thanks, it is worth a read. > > Most of the time when I see code copied from scipy or statsmodels, it is >