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POPython 2.7 created with altinstall needs to access scipy dependencies
 

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  1. POPython 2.7 created with altinstall needs to access scipy dependencies
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    <p>I recently updated my CentOS6 server from Python 2.6 to 2.7, by leaving the system version alone and using the altinstall method. </p> <pre><code># yum groupinstall "Development tools" # yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel # wget http://python.org/ftp/python/2.7.3/Python-2.7.3.tar.bz2 # tar xf Python-2.7.3.tar.bz2 # cd Python-2.7.3 # ./configure --prefix=/usr/local # make &amp;&amp; make altinstall </code></pre> <p>Then I installed distribute and through it, virtual env</p> <pre><code># wget http://pypi.python.org/packages/source/d/distribute/distribute-0.6.35.tar.gz # tar xf distribute-0.6.35.tar.gz # cd distribute-0.6.35 # python2.7 setup.py install # easy_install-2.7 virtualenv # virtualenv-2.7 --distribute someproject New python executable in someproject/bin/python2.7 Also creating executable in someproject/bin/python Installing distribute...................done. Installing pip................done. # source someproject/bin/activate (someproject)# python --version Python 2.7.3 (someproject)# </code></pre> <p>Everything works great, I activate my virtualenv and install anything I need there, with one exception, those damn scipy and numpy modules!! When I try to instal scipy, I get the following error:</p> <pre><code>error: Blas (http://www.netlib.org/blas/) libraries not found. Directories to search for the libraries can be specified in the numpy/distutils/site.cfg file (section [blas]) or by setting the BLAS environment variable. </code></pre> <p>I did loads of research and reading, and it seems that the problem is not with the virtualenv settings but with the python2.7 installation which doesn't seem to be using those libraries at all. It also seems that it is really difficult to recompile them for just this version of Python. Is this the case or I am missing something here?</p> <p>Do you know how I can point my newly installed python2.7 version to use those libraries? Or just point me to the correct direction?</p> <p><strong>EDIT</strong>: The -dev packages that include those dependencies have already been installed in the past for python2.6, however they cannot be accessed for the new version created with altinstall.</p>
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    1. COI'm not familiar with rh/centos - but try installing the -dev packages of blas from the repo, this should install all the build requirements then you can compile it for yourself.
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      1. USBurhan Khalid
    2. COI have already installed them in the past and they work for python2.6. How can the new python version access them though?
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      1. POPython 2.7 created with altinstall needs to access scipy dependencies
      1. USDennis Tsoumas
    3. COWhat did you install exactly? centos typically has binary package and then the -dev equivalents; if you installed the binary packages it was compiled against the reference version of Python and would not have installed the build libraries.
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      1. POPython 2.7 created with altinstall needs to access scipy dependencies
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