Install from source creates corrupted python package

[breznak]

Hi,
I'm trying to install from source, during compilation everything looks fine, but I get error when I try to import from the produced module.
(Ubuntu 14.04, python 2.7, clean virtualenv):

Install:

mmm@mmm-U2442:~/devel/fastcache$ virtualenv demo
New python executable in demo/bin/python
Installing setuptools, pip...done.
mmm@mmm-U2442:~/devel/fastcache$ source demo/bin/activate
(demo)mmm@mmm-U2442:~/devel/fastcache$ python --version
Python 2.7.6
(demo)mmm@mmm-U2442:~/devel/fastcache$ pip list
argparse (1.2.1)
pip (1.5.4)
setuptools (2.2)
wsgiref (0.1.2)
(demo)mmm@mmm-U2442:~/devel/fastcache$ git pull
Already up-to-date.
(demo)mmm@mmm-U2442:~/devel/fastcache$ python setup.py build
running build
running build_py
creating build
creating build/lib.linux-x86_64-2.7
creating build/lib.linux-x86_64-2.7/fastcache
copying fastcache/__init__.py -> build/lib.linux-x86_64-2.7/fastcache
copying fastcache/benchmark.py -> build/lib.linux-x86_64-2.7/fastcache
creating build/lib.linux-x86_64-2.7/fastcache/tests
copying fastcache/tests/test_thread.py -> build/lib.linux-x86_64-2.7/fastcache/tests
copying fastcache/tests/__init__.py -> build/lib.linux-x86_64-2.7/fastcache/tests
copying fastcache/tests/test_clrucache.py -> build/lib.linux-x86_64-2.7/fastcache/tests
copying fastcache/tests/test_functools.py -> build/lib.linux-x86_64-2.7/fastcache/tests
running build_ext
building 'fastcache._lrucache' extension
creating build/temp.linux-x86_64-2.7
creating build/temp.linux-x86_64-2.7/src
x86_64-linux-gnu-gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c src/_lrucache.c -o build/temp.linux-x86_64-2.7/src/_lrucache.o
x86_64-linux-gnu-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -D_FORTIFY_SOURCE=2 -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security build/temp.linux-x86_64-2.7/src/_lrucache.o -o build/lib.linux-x86_64-2.7/fastcache/_lrucache.so
(demo)mmm@mmm-U2442:~/devel/fastcache$ echo $?
0
(demo)mmm@mmm-U2442:~/devel/fastcache$ python setup.py install 
running install
running build
running build_py
running build_ext
running install_lib
creating /home/mmm/devel/fastcache/demo/lib/python2.7/site-packages/fastcache
copying build/lib.linux-x86_64-2.7/fastcache/__init__.py -> /home/mmm/devel/fastcache/demo/lib/python2.7/site-packages/fastcache
creating /home/mmm/devel/fastcache/demo/lib/python2.7/site-packages/fastcache/tests
copying build/lib.linux-x86_64-2.7/fastcache/tests/test_thread.py -> /home/mmm/devel/fastcache/demo/lib/python2.7/site-packages/fastcache/tests
copying build/lib.linux-x86_64-2.7/fastcache/tests/__init__.py -> /home/mmm/devel/fastcache/demo/lib/python2.7/site-packages/fastcache/tests
copying build/lib.linux-x86_64-2.7/fastcache/tests/test_clrucache.py -> /home/mmm/devel/fastcache/demo/lib/python2.7/site-packages/fastcache/tests
copying build/lib.linux-x86_64-2.7/fastcache/tests/test_functools.py -> /home/mmm/devel/fastcache/demo/lib/python2.7/site-packages/fastcache/tests
copying build/lib.linux-x86_64-2.7/fastcache/benchmark.py -> /home/mmm/devel/fastcache/demo/lib/python2.7/site-packages/fastcache
copying build/lib.linux-x86_64-2.7/fastcache/_lrucache.so -> /home/mmm/devel/fastcache/demo/lib/python2.7/site-packages/fastcache
byte-compiling /home/mmm/devel/fastcache/demo/lib/python2.7/site-packages/fastcache/__init__.py to __init__.pyc
byte-compiling /home/mmm/devel/fastcache/demo/lib/python2.7/site-packages/fastcache/tests/test_thread.py to test_thread.pyc
byte-compiling /home/mmm/devel/fastcache/demo/lib/python2.7/site-packages/fastcache/tests/__init__.py to __init__.pyc
byte-compiling /home/mmm/devel/fastcache/demo/lib/python2.7/site-packages/fastcache/tests/test_clrucache.py to test_clrucache.pyc
byte-compiling /home/mmm/devel/fastcache/demo/lib/python2.7/site-packages/fastcache/tests/test_functools.py to test_functools.pyc
byte-compiling /home/mmm/devel/fastcache/demo/lib/python2.7/site-packages/fastcache/benchmark.py to benchmark.pyc
running install_egg_info
running egg_info
writing dependency_links to fastcache.egg-info/dependency_links.txt
writing fastcache.egg-info/PKG-INFO
writing top-level names to fastcache.egg-info/top_level.txt
reading manifest file 'fastcache.egg-info/SOURCES.txt'
writing manifest file 'fastcache.egg-info/SOURCES.txt'
Copying fastcache.egg-info to /home/mmm/devel/fastcache/demo/lib/python2.7/site-packages/fastcache-1.0.2-py2.7.egg-info
running install_scripts
(demo)mmm@mmm-U2442:~/devel/fastcache$ pip list
argparse (1.2.1)
fastcache (1.0.2)
pip (1.5.4)
setuptools (2.2)
wsgiref (0.1.2)

Run:

(demo)mmm@mmm-U2442:~/devel/fastcache$ python -c "import fastcache"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "fastcache/__init__.py", line 27, in <module>
    from ._lrucache import clru_cache
ImportError: No module named _lrucache

The package from pip works.
Thanks,

[breznak]

I noticed my virtualenv comes with rather dated versions of packages, so I've upgraded pip, setuptools, virtualenv to the latest...with no change unfortunately.

[pbrady]

It looks like you may be importing fastcache from the base directory rather than the build/install directory. This works with pure python packages but not with c-extensions. After running setup.py install try something like:

mkdir tmp; cd tmp; python -c "import fastcache"

[breznak]

Awesome @pbrady ! Yes, the err only occurs when I try to import from the root of the git repo, from any other path it works fine. Closing as resolved, thanks.

[pbrady]

No problem. I've done the same thing many things.