Python从2.7.6更新到2.7.8-我只是失去了以前安装的所有模块吗？

Question

Title basically states it all. I upgraded my version of Python in order to hopefully play more nicely with Mac OS 10.9, but am now unable to use some modules I need for my work ( NumPy , Pandas , SciPy , Scikit-Learn , etc.) Does this upgrade automatically wipe out any previously installed modules? Do I just need to install them again? Thanks in advance.

Answer 1

When you upgraded, it created a new sitepackages directory structure. Your packages are not installed any more, so yes you need to reinstall them into the new version.

Before you do that, take a good look at virtual environments rather than install the modules and packages globally.

http://docs.python-guide.org/en/latest/dev/virtualenvs will get you started, then google virtualenvwrapper.

Answer 2

I would recommend you try out the anaconda python distribution. It comes with all of these packages pre-installed, and its free. Also, in addition to pip, you can use the conda package manager which is much better for scientific packages. See http://technicaldiscovery.blogspot.com/2013/12/why-i-promote-conda.html for an explanation.

With conda , you can install numpy/scipy/pandas/etc with conda install numpy scipy pandas and it just works, and takes about 10 seconds. No compilation necessary (OTOH pip install scipy can take over 15 minutes, requires a fortran compiler, and is generally very tricky).

link: http://continuum.io/downloads