[Numpy-discussion] Removing datetime support for 1.4.x series ?
Fernando Perez
fperez.net@gmail....
Thu Feb 4 13:21:31 CST 2010
On Thu, Feb 4, 2010 at 2:37 AM, Travis Oliphant <oliphant@enthought.com> wrote:
> Perhaps one way to articulate my perspective is the following:
> There are currently 2 groups of NumPy users:
> 1) those who have re-compiled all of their code for 1.4.0
> 2) those who haven't
It may be useful to keep in mind one important aspect of the cascading
dependency effect we are dealing with here; I could recompile *my*
codes easily for numpy from svn (I used to do it routinely). But with
an ABI break, there are a *ton* of packages now on my system that
would break if I put a new numpy in my python path. An easy way to
see this is to see how many system packages I'd have to remove if I
removed numpy:
sudo apt-get remove python-numpy python-numpy-dbg python-numpy-doc
[...]
The following packages will be REMOVED:
impressive keyjnote mayavi2 music-applet python-gnuplot python-matplotlib
python-mdp python-mvpa python-mvpa-lib python-netcdf python-numpy
python-numpy-dbg python-numpy-doc python-pyepl python-pygame python-pywt
python-rpy python-scientific python-scientific-doc python-scipy python-sparse
python-sparse-examples python-tables python-visual pyxplot sagemath
0 upgraded, 0 newly installed, 26 to remove and 0 not upgraded.
After this operation, 341MB disk space will be freed.
Basically this means that if I want to update numpy on my ubuntu 9.10
laptop, all of a sudden not only do I have to recompile things like
my codes or scipy/matplotlib (which I'd expect), but I also have to
rebuild 23 other system-installed packages which would probably
otherwise be fine.
For this reason, I've had to back off completely from using
post-abi-break numpy, I simply can't afford the time to break and
rebuild so much of my system.
I know this is a messy and difficult situation, but I wanted to
illustrate this aspect of the dependency problem because I haven't
seen it mentioned so far in the discussion, and it's a fairly nasty
one.
Regards,
f
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