Scientific Python tips and tricks | Hacker News Reader

Scientific Python tips and tricks

scottsievert.github.io

16 pointsskierscott5 comments

Is there a trick to installing scipy on windows7 without admin rights and on a standard Python 3.3?

I went all the way to MinGW, but fell apart at the fortran stuff.

The default python path is `c:\python2.7`. I would install a new python in your home directory then edit your $PYTHONPATH (or windows equivalent) to point to that directory.

Then, I'd use `pip install numpy scipy` (since numpy is a scipy dependency).

the pip install scipy fails with:

numpy.distutils.system_info.BlasNotFoundError: Blas (http://www.netlib.org/blas/) libraries not found. Directories to search for the libraries can be specifies in the numpy/distutils/site.cfg file (section [blas]) or by setting the BLAS environment variable.

I know this isn't stackoverflow, so no further info needed.

Needless to say, going down the netlib.org/blas/ is quite brutal on windows...

Both scipy and numpy working fine here (Python 2.7.6 x64).

  >>> import scipy
  >>> scipy.test()
  Running unit tests for scipy
  NumPy version 1.8.1
  NumPy is installed in C:\Python27\lib\site-packages\numpy
  SciPy version 0.14.0rc2
  SciPy is installed in C:\Python27\lib\site-packages\scipy
  Python version 2.7.6 (default, Nov 10 2013, 19:24:24) [MSC 
    v.1500 64 bit (AMD64)]
  nose version 1.3.3
  ....

  Ran 16575 tests in 136.936s

  OK (KNOWNFAIL=277, SKIP=1181)
  <nose.result.TextTestResult run=16575 errors=0 failures=0>

Have you tried using Christoph Gohlke's pre-compiled binaries[1]? Here's the list of libraries I have installed [2].

Also don't customize any install paths; leave it everything as default (e.g., C:\Python27). I've long gave up trying to keep my root folder under control; now it's a festival of Ruby, MinGW, Vagrant, etc.

This is the only way to install python libraries under Windows without pulling your hair out. Any other way is truly a nightmare. That's why I use Linux whenever possible for most of my coding.

[1] http://www.lfd.uci.edu/~gohlke/pythonlibs/

[2] http://imgur.com/WahewF2

Yes, I did. However, as I work behind the corporate firewall, I was unable to download the .exe files on Christoph's site.

I hear you on the Linux business, and that's what I use at home and elsewhere, but it's not an option at the office.

Reply on news.ycombinator.com