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How can I correct corrupted $PYTHONPATH?

Answer 1

+1 A:

Is mercurial located in one of the library installation paths (dist-packages or site-packages)? You can use the find tool to look for it?

Did you have luck installing small libraries and access them from Python on this machine?

Eli Bendersky 2009-12-04 14:35:48

A search with find (find /usr/ -name mercurial -type d) gives me the following:./lib/pyshared/python2.5/mercurial./lib/pyshared/python2.6/mercurial./lib/pymodules/python2.6/mercurial./share/mercurial./share/pyshared/mercurialIf you mean with small libraries, libraries from my ~/python/<lib>, then yes, I *can* import them :) . Also essential modules like sys, os, io, all no problem.Most of my libraries are located in /usr/lib/pymodules , but adding this path to $PYTHONPATH after restarting the shell, doesn't solve the problem.Thanks for your effort.!

Kenny M. 2009-12-04 14:49:00

Try `/usr/lib/pymodules/python2.6`.

hughdbrown 2009-12-04 16:02:43

Answer 2

A:

You could try to reinstall affected Python programs with aptitude:

sudo aptitude reinstall mercurial

John Paulett 2009-12-04 14:44:25

This doesn't solve the problem either ..

Kenny M. 2009-12-04 14:51:15

Answer 3

+2 A:

All of the sites I've googled for this say that your PYTHONPATH is set wrong. The code that you are hitting in mercurial appears to be this:

try:
    from mercurial import demandimport; demandimport.enable()
except ImportError:
    import sys
    sys.stderr.write("abort: couldn't find mercurial libraries in [%s]\n" %
                     ' '.join(sys.path))
    sys.stderr.write("(check your install and PYTHONPATH)\n")
    sys.exit(-1)

So where is demandimport on your machine? On my windows box, it is here:

>>> from mercurial import demandimport
>>> demandimport.__file__
'C:\\Python26\\lib\\site-packages\\mercurial-1.4.1-py2.6-win32.egg\\mercurial\\demandimport.pyc'

And that works because I have mercurial in my PYTHONPATH:

>>> import sys
>>> for s in sys.path:
...     print s
...
# Other crud deleted...
C:\Python26\lib\site-packages\mercurial-1.4.1-py2.6-win32.egg
C:\Windows\system32\python26.zip
C:\Python26\DLLs
C:\Python26\lib
C:\Python26\lib\plat-win
C:\Python26\lib\lib-tk
C:\Python26
C:\Python26\lib\site-packages

Your PYTHONPATH makes no mention of mercurial. At a guess, I would add this to your PYTHONPATH:

/usr/local/lib/python2.6/site-packages

and I would re-install mercurial from make. That advice worked well here.

Edit: And on my Ubuntu 9.10 box, I got these results:

>>> import mercurial
>>> mercurial.__file__
'/usr/lib/pymodules/python2.6/mercurial/__init__.pyc'
>>> import sys
>>> for s in sys.path:
...     print s
...

/usr/local/lib/python2.6/dist-packages/pip-0.6.1-py2.6.egg
/usr/local/lib/python2.6/dist-packages/virtualenv-1.4.3-py2.6.egg
/usr/lib/python2.6
/usr/lib/python2.6/plat-linux2
/usr/lib/python2.6/lib-tk
/usr/lib/python2.6/lib-old
/usr/lib/python2.6/lib-dynload
/usr/lib/python2.6/dist-packages
/usr/lib/python2.6/dist-packages/PIL
/usr/lib/python2.6/dist-packages/gst-0.10
/usr/lib/pymodules/python2.6
/usr/lib/python2.6/dist-packages/gtk-2.0
/usr/lib/pymodules/python2.6/gtk-2.0
/usr/local/lib/python2.6/dist-packages
/usr/local/lib/python2.6/dist-packages/PIL

And this makes me think the problem is that this is missing for you: /usr/lib/pymodules/python2.6.

hughdbrown 2009-12-04 15:54:07

Answer 4

+1 A:

Thanks for the effort to all of you.

I've solved the problem thanks to hughdbrown. hughdbrown, you've made me realize that I commited a typo when defining doing $PYTHONPATH; instead of adding the path /usr/lib/pymodules/python2.6, I wrote /usr/lib/pymodules/ so python couldn't import the libraries... However, I corrected it and I'm glad to see Mercurial and Co. work again.

The only strange thing is, WHY it changed... Well, I'll be knowing from now on what to do.

Kenny M. 2009-12-04 17:47:30

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