Hi Junhwan,

You might have more success installing pyx directly from source.  You will need to download the source distribution tarball and then build and install it using `python setup.py install`.  When I tried to install pyx recently I discovered that the most recent version dropped support for python 2 entirely, so you may need to use a slightly older version if you want to use pyx from within yt.

-Nathan


On Wed, Mar 26, 2014 at 7:08 AM, Junhwan Choi (최준환) <choi.junhwan@gmail.com> wrote:
Hi yt users,

I try to install pyx onto my existing yt package (including yt,
python, numpy ....).
Buit I get following error message:
======
Downloading/unpacking pyx
  Could not find any downloads that satisfy the requirement pyx
  Some externally hosted files were ignored (use --allow-external pyx to allow).
Cleaning up...
No distributions at all found for pyx
Storing debug log for failure in /home52/jhchoi/.pip/pip.log
====
The pip.log file says
------------------------------------------------------------
/home/jhchoi/common/bin/pip run on Wed Mar 26 10:05:31 2014
Downloading/unpacking pyx
  Getting page https://pypi.python.org/simple/pyx/
  URLs to search for versions for pyx:
  * https://pypi.python.org/simple/pyx/
  Analyzing links from page https://pypi.python.org/simple/PyX/
    Skipping https://downloads.sourceforge.net/project/pyx/pyx/0.12.1/PyX-0.12.1.tar.gz#md5=04263eb002553dae0e8a1d0eeb805ec1
(from https://pypi.python.org/simple/PyX/) because it is externally
hosted.
    Skipping https://downloads.sourceforge.net/project/pyx/pyx/0.13/PyX-0.13.tar.gz#md5=aeda519f5b3f118a9c940c82758489d0
(from https://pypi.python.org/simple/PyX/) because it is externally
hosted.
  Could not find any downloads that satisfy the requirement pyx
  Some externally hosted files were ignored (use --allow-external pyx to allow).
Cleaning up...
  Removing temporary dir /tmp/pip_build_jhchoi...
No distributions at all found for pyx
Exception information:
Traceback (most recent call last):
  File "/home/jhchoi/common/lib/python2.7/site-packages/pip-1.5.4-py2.7.egg/pip/basecommand.py",
line 122, in main
    status = self.run(options, args)
  File "/home/jhchoi/common/lib/python2.7/site-packages/pip-1.5.4-py2.7.egg/pip/commands/install.py",
line 278, in run
    requirement_set.prepare_files(finder,
force_root_egg_info=self.bundle, bundle=self.bundle)
  File "/home/jhchoi/common/lib/python2.7/site-packages/pip-1.5.4-py2.7.egg/pip/req.py",
line 1177, in prepare_files
    url = finder.find_requirement(req_to_install, upgrade=self.upgrade)
  File "/home/jhchoi/common/lib/python2.7/site-packages/pip-1.5.4-py2.7.egg/pip/index.py",
line 277, in find_requirement
    raise DistributionNotFound('No distributions at all found for %s' % req)
DistributionNotFound: No distributions at all found for pyx

What does this error mean? And could anyone inform me how to resolve
this problem?

Thank you in advance,
Junhwan Choi
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