[Numpy-discussion] numpy and readline installation fails

abc def cannonjunk@hotmail.co...
Wed Jul 4 09:16:16 CDT 2012


I'm new to python and I'd like to learn about numpy / scipy / matplotlib, but I'm having trouble getting started.

I'm following the instructions here: http://www.scipy.org/Getting_Started

First I installed the latest version of python from python.org by downloading the dmg file, since I read that it doesn't work with apple's installer, and then installed numpy / scipy / matplotlib by downloading the relevent dmg files.
I then downloaded ipython, ran "easy_install readline" and then ran "python setup.py install".

Then I started ipython with "ipython -pylab" as per the instructions but then I get muliple error messages:

$ ipython --pylab
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/IPython/utils/rlineimpl.py:111: RuntimeWarning: 
libedit detected - readline will not be well behaved, including but not limited to:
   * crashes on tab completion
   * incorrect history navigation
   * corrupting long-lines
   * failure to wrap or indent lines properly
It is highly recommended that you install readline, which is easy_installable:
     easy_install readline
Note that `pip install readline` generally DOES NOT WORK, because
it installs to site-packages, which come *after* lib-dynload in sys.path,
where readline is located.  It must be `easy_install readline`, or to a custom
location on your PYTHONPATH (even --user comes after lib-dyload).
Python 2.7.3 (v2.7.3:70274d53c1dd, Apr  9 2012, 20:52:43) 
Type "copyright", "credits" or "license" for more information.

IPython 0.13 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.
[TerminalIPythonApp] GUI event loop or pylab initialization failed
ImportError                               Traceback (most recent call last)
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/IPython/core/pylabtools.pyc in find_gui_and_backend(gui)
    194     """
--> 196     import matplotlib
    198     if gui and gui != 'auto':

/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/__init__.py in <module>()
    131 import sys, os, tempfile
--> 133 from matplotlib.rcsetup import (defaultParams,
    134                                 validate_backend,
    135                                 validate_toolbar,

/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/rcsetup.py in <module>()
     17 import warnings
     18 from matplotlib.fontconfig_pattern import parse_fontconfig_pattern
---> 19 from matplotlib.colors import is_color_like
     21 #interactive_bk = ['gtk', 'gtkagg', 'gtkcairo', 'fltkagg', 'qtagg', 'qt4agg',

/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/colors.py in <module>()
     50 """
     51 import re
---> 52 import numpy as np
     53 from numpy import ma
     54 import matplotlib.cbook as cbook

ImportError: No module named numpy

In [1]:  

it seems the installation of numpy and readline didn't work, and there are problems with matplotlib, even though I think I followed all the instructions carefully.
I can't figure out what I did wrong. Can anybody help?

I'm running mac os 10.6.

Thank you!



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