numscons throws an AssertionError on module import

[John B. Cole]

I downloaded and installed numscons 0.4.1 on my machine (64-bit RHEL 4, Python 2.4 built from source in a user account). Upon import (e.g. import numscons) numscons throws an AssertionError exception:

[jcole@aipl366 jcole]$ python
Python 2.4.1 (#2, Sep 14 2005, 11:12:15)
[GCC 3.4.3 20050227 (Red Hat 3.4.3-22.1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import numscons
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/home/jcole/lib/python2.4/site-packages/numscons-0.4.1-py2.4.egg/numscons/__init__.py", line 26, in ?
    from checkers import CheckF77BLAS, CheckCBLAS, CheckCLAPACK, CheckF77LAPACK, CheckFFT
  File "/home/jcole/lib/python2.4/site-packages/numscons-0.4.1-py2.4.egg/numscons/checkers/__init__.py", line 1, in ?
    from blas_lapack_checkers import CheckCLAPACK, CheckCBLAS, CheckF77BLAS, CheckF77LAPACK
  File "/home/jcole/lib/python2.4/site-packages/numscons-0.4.1-py2.4.egg/numscons/checkers/blas_lapack_checkers.py", line 18, in ?
    from numscons.checkers.perflib import CONFIG, get_perflib_info
  File "/home/jcole/lib/python2.4/site-packages/numscons-0.4.1-py2.4.egg/numscons/checkers/perflib.py", line 15, in ?
    from numscons.checkers.perflib_config import IsFactory, GetVersionFactory, \
  File "/home/jcole/lib/python2.4/site-packages/numscons-0.4.1-py2.4.egg/numscons/checkers/perflib_config.py", line 95, in ?
    CONFIG = build_config()
  File "/home/jcole/lib/python2.4/site-packages/numscons-0.4.1-py2.4.egg/numscons/checkers/perflib_config.py", line 66, in build_config
    assert len(st) > 0
AssertionError
>>>

As a result, I cannot try building the current trunk of NumPy.

[David Cournapeau (david-ar)]

Thanks for the bug report.

Can I ask you where you got the egg ? The assertion is an internal consistency check, which fails only when there is an installation problem. Can you check whether your egg archive contains the file perflib.cfg in numscons/checkers ?

[John B. Cole (john-cole)]

Sure. I got the egg by downloading numscons-0.4.1.tar.bz2 from the launchpad site (https://launchpad.net/numpy.scons.support/+download) like it said to on your wiki. My archive does NOT contain perflib.cfg. Here are the perflib files I DO have in numscons/checkers:

perflib_config.py
perflib_info.py
perflib.py

I did not have a pre-existing numscons installation when I installe 0.4.1.

Thanks for your help; trying to get numpy built from source using distutils was costing me my sanity.

[David Cournapeau (david-ar)]

Well it looks like building with numscons has not been a success either :)

Ok, so if I understand correctly, you build the egg from sources, right ? I've just realized that I forgot to upload 0.4.1.1, which solves this bug I noticed myself. I uploaded to pypi, but forgot to upload on launchpad. This is fixed now.

[John B. Cole (john-cole)]

Hi, David.

I deleted the numscons tree in my site-packages directory, downloaded 0.4.1.1 from launchpad. built it, and installed it. Unfortunately, there is still no perflib.cfg file in the archive (I used the bz2 version). I grepped the tree to make sure that I wasn't simply missing the file.

I then downloaded the actual .egg file, updated ez_setup, and tried installing using "easy_install numscons-0.4.1.1-py2.4.egg". That worked. It looks like perhaps not all of the distributions you're rolling are being correctly packaged, but I'm not sure why that would be.

[David Cournapeau (david-ar)]

Sorry about the trouble. I screwed up between branches; this time, I should have correctly merged everything in 0.4.2. I put eggs and source archives; I also checked that perflib.cfg is found in all tarballs.

[David Cournapeau (david-ar)]

Fix in 0.4.2 release