importing site fails - why?

Stefan Sonnenberg-Carstens stefan.sonnenberg at pythonmeister.com
Fri Nov 12 19:42:46 CET 2010


Am 12.11.2010 19:32, schrieb Helmut Jarausch:
> Hi,
>
> as often before, I've cloned a working system (GenToo) onto another
> machine. There, from a livecd and chroot to the cloned root partition
>
> python -v
> import site
>
> fails with the following error
> Python 2.6.6 (r266:84292, Oct 13 2010, 09:06:24)
> [GCC 4.4.4] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> dlopen("/usr/lib64/python2.6/lib-dynload/readline.so", 2);
> import readline # dynamically loaded from /usr/lib64/python2.6/lib-
> dynload/readline.so
>>>> import site
> # /usr/lib64/python2.6/site.pyc matches /usr/lib64/python2.6/site.py
> import site # precompiled from /usr/lib64/python2.6/site.pyc
> Traceback (most recent call last):
>    File "<stdin>", line 1, in<module>
>    File "/usr/lib64/python2.6/site.py", line 526, in<module>
>      main()
>    File "/usr/lib64/python2.6/site.py", line 509, in main
>      known_paths = addsitepackages(known_paths)
>    File "/usr/lib64/python2.6/site.py", line 289, in addsitepackages
>      addsitedir(sitedir, known_paths)
>    File "/usr/lib64/python2.6/site.py", line 185, in addsitedir
>      addpackage(sitedir, name, known_paths)
>    File "/usr/lib64/python2.6/site.py", line 159, in addpackage
>      if not dircase in known_paths and os.path.exists(dir):
>    File "/usr/lib64/python2.6/genericpath.py", line 18, in exists
>      st = os.stat(path)
> TypeError: stat() argument 1 must be encoded string without NULL bytes,
> not str
>>>>> I'm puzzled and I'd appreciate any hints to the reason for this failure.
>
> Many thanks,
> Helmut.
You gave the answer yourself.
Chrooting does not automatically mean your SO cache is where it should 
be for the target system.
Perhaps your livecd is newer/older than the target system or simply the 
python in live environment
is not (most likely) compiled as the one in the target system.

That is _one_ reason I stoped using gentoo and switched to debian/ubuntu.
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