Re: [matplotlib-devel] Odd install error

[Michael D. <md...@st...>]

Unfortunately, this is a known bug in setuptools.  It has no concept of 
"build time" dependencies, so it probably computed all of the 
dependencies correctly, but it doesn't install them in the correct order 
-- it just assumes that as long as everything gets installed it will 
work when it's finally run.  This is the same problem that means even 
though matplotlib specifies numpy as a dependency, "pip install 
matplotlib" will not work unless numpy is already installed.  This is a 
perennial problem, and apparently the setuptools guys spend very little 
time considering C extensions at all.

Mike

On 09/20/2013 09:37 AM, Benjamin Root wrote:
> So, I was working from a completely fresh virtualenv, installing a 
> package that had a matplotlib dependency. As it happens to be, the 
> dependencies in this package lists matplotlib prior to numpy, so 
> matplotlib got processed first. For whatever reason, while processing 
> matplotlib, it didn't seem to think that it depended upon NumPy, but 
> failed anyway when it couldn't find it.  See the following output:
>
> Best match: matplotlib 1.3.0
> Downloading 
> https://downloads.sourceforge.net/project/matplotlib/matplotlib/matplotlib-1.3.0/matplotlib-1.3.0.tar.gz
> Processing matplotlib-1.3.0.tar.gz
> Writing /tmp/easy_install-ZJ_Xb6/matplotlib-1.3.0/setup.cfg
> Running matplotlib-1.3.0/setup.py -q bdist_egg --dist-dir 
> /tmp/easy_install-ZJ_Xb6/matplotlib-1.3.0/egg-dist-tmp-OqRvd1
> ============================================================================
> Edit setup.cfg to change the build options
>
> BUILDING MATPLOTLIB
>             matplotlib: yes [1.3.0]
>                 python: yes [2.7.1 (r271:86832, Dec  8 2011, 
> 15:48:40)  [GCC
>                         4.1.2 20080704 (Red Hat 4.1.2-51)]]
>               platform: yes [linux2]
>
> REQUIRED DEPENDENCIES AND EXTENSIONS
> error: Setup script exited with Requires numpy 1.5 or later to build.  
> (Numpy not found)
> Error in atexit._run_exitfuncs:
> Traceback (most recent call last):
>   File "/usr/local/CentOS5/lib/python2.7/atexit.py", line 24, in 
> _run_exitfuncs
>     func(*targs, **kargs)
>   File "/usr/local/CentOS5/lib/python2.7/multiprocessing/util.py", 
> line 258, in _exit_function
>     info('process shutting down')
> TypeError: 'NoneType' object is not callable
> Error in sys.exitfunc:
> Traceback (most recent call last):
>   File "/usr/local/CentOS5/lib/python2.7/atexit.py", line 24, in 
> _run_exitfuncs
>     func(*targs, **kargs)
>   File "/usr/local/CentOS5/lib/python2.7/multiprocessing/util.py", 
> line 258, in _exit_function
>     info('process shutting down')
> TypeError: 'NoneType' object is not callable
>
> Thoughts?
> Ben Root
>
>
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