On 10 August 2013 12:50, Roy Smith <r...@panix.com> wrote: > In article <mailman.417.1376104455.1251.python-l...@python.org>, > Skip Montanaro <s...@pobox.com> wrote: > >> Given that installing numpy or scipy is generally no more difficult >> that executing "pip install (scipy|numpy)" I'm not really feeling the >> need for a battery here... > > I just tried installing numpy in a fresh virtualenv on an Ubuntu Precise > box. I ran "pip install numpy". It took 1.5 minutes. It printed > almost 1800 lines of build crap, including 383 warnings and 83 errors. > For a newbie, that can be pretty intimidating. > > That's for the case where I've already installed numpy elsewhere on that > box, so I already had the fortran compiler, and the rest of the build > chain. For fun, I just spun up a new Ubuntu Precise instance in AWS. > It came pre-installed with Python 2.7.3. I tried "pip install numpy", > which told me that pip was not installed. > > At least it told me what I needed to do to get pip installed. > Unfortunately, I didn't read the message carefully enough and typed > "sudo apt-get install pip", which of course got me another error because > the correct name of the package is python-pip. Doing "sudo apt-get > install python-pip" finally got me to the point where I could start to > install numpy. > > Of course, if I didn't have sudo privs on the box (most corporate > environments), I never would have gotten that far. > > At this point, "sudo pip install numpy" got me a bunch of errors > culminating in "RuntimeError: Broken toolchain: cannot link a simple C > program", and no indication of how to get any further.
You should use apt-get for numpy/scipy on Ubuntu. Although unfortunately IIRC this doesn't work as well as it should since Ubuntu doesn't install the appropriate BLAS/LAPACK libraries by default (leaving you with numpy's fallback libraries). On Windows you should use the MSI installer (or easy_install). Hopefully numpy/scipy will start distributing wheels soon and pip install numpy will actually work. Oscar -- http://mail.python.org/mailman/listinfo/python-list
