ImportError: No module named _markerlib

[Aikido Guy]

Sorry for the noise as I know this type of question has been asked many times.

I get the error via Trac and also from the command line:

   > python -c "import _markerlib"

So I know it is a python issue and not a Trac issue... but my google fu is not so good on a friday. Does anyone have any suggestions for what python packages to check/fix?

Very much appreciated!

Kindly,

Aikido Guy

[RjOllos]

This is the mailing list for users of the Trac issue tracker, for questions and discussion about the Trac issue tracker. It sounds like you are looking for the mailing list for the markerlib library.

- Ryan

[Aikido Guy]

Thank you for the question... but I am trying to get Trac running and have narrowed down the error (after spending the whole day trying to upgrade). I was hoping that since I am upgrading from Trac 1.0.2 to 1.0.11 and this is what I do not know how to solve, someone on this list may know how to help me with my upgrade under Ubuntu. I ask here as I know that others have been able to upgrade to 1.0.11 successfully...

Any help is very much appreciated... and will be treated with the utmost of care!

[Aikido Guy]

I get the error via Trac and also from the command line:

   > python -c "import _markerlib"

I've tried:

> easy_install –Z –upgrade setuputils

and still have the same error message... 

I will keep trying to upgrade trac and will post my results here after I figure out how to get past this upgrade problem...

Kindly!

[RjOllos]

On Friday, June 3, 2016 at 1:21:37 PM UTC-7, Aikido Guy wrote:

Thank you for the question... but I am trying to get Trac running and have narrowed down the error (after spending the whole day trying to upgrade). I was hoping that since I am upgrading from Trac 1.0.2 to 1.0.11 and this is what I do not know how to solve, someone on this list may know how to help me with my upgrade under Ubuntu. I ask here as I know that others have been able to upgrade to 1.0.11 successfully...

Any help is very much appreciated... and will be treated with the utmost of care!

Sorry, I read too quickly and misunderstood. Your question is appropriate for this mailing list.

In a virtual environment I find the following directories:

$find pve -name "_markerlib"

pve/lib/python2.7/site-packages/_markerlib

pve/lib/python2.7/site-packages/pip/_vendor/_markerlib

Based on that, I'd do the following:

* Uninstall pip, then reinstall the latest version of pip 

* Uninstall setuptools, then reinstall the latest version of setuptools

* Recreate the virtualenv if using a virtualenv

* If not using a virtualenv, it might be the case that your python installation is broken

Where do you see the error in Trac? Is it when starting the Trac instance? Could you post a screen capture of the error or a traceback?

- Ryan

[RjOllos]

On Friday, June 3, 2016 at 1:35:28 PM UTC-7, Aikido Guy wrote:

I get the error via Trac and also from the command line:

   > python -c "import _markerlib"

I've tried:

> easy_install –Z –upgrade setuputils

Hopefully that is a typo. It should be:

easy_install --upgrade setuptools

 

and still have the same error message... 

I will keep trying to upgrade trac and will post my results here after I figure out how to get past this upgrade problem...

Kindly!

Which version of Python are you running? I suggest you use pip to add/remove packages. If Python 2.7.9 or later you have access to pip by default. Otherwise, see:

https://pip.pypa.io/en/stable/installing/

- Ryan

[Aikido Guy]

Thank you for all of your great suggestions! I appreciate them all ;)

Here is what I've tried and still have the error. Maybe there is something simple that I can do that I'm overlooking?

Kindly,

Aikido Guy

Tried the following

> pip uninstall pip

> easy_install --upgrade pip

> pip uninstall setuputils

> pip install setuputils     # got an SNIMissingWarning

> cd /usr/local/lib/python2.7/dist-packages

> chgrp –R www-data *

> python –version

     Python 2.7.6

 

And the error still appears after stopping and then starting apache:

 

MOD_PYTHON ERROR

 

ProcessId:      21035

Interpreter:    'main_interpreter'

 

ServerName:     ... snip ...

DocumentRoot:   '/srv/html'

 

URI:            '/trac/TracUpgrade_1_0_11' # I created a new environment using trac-admin 1.0.11 for testing

Location:       '/trac'

Directory:      None

Filename:       '/srv/html/trac'

PathInfo:       '/TracUpgrade_1_0_11'

 

Phase:          'PythonHandler'

Handler:        'trac.web.modpython_frontend'

 

Traceback (most recent call last):

 

  File "/usr/lib/python2.7/dist-packages/mod_python/importer.py", line 1537, in HandlerDispatch

    default=default_handler, arg=req, silent=hlist.silent)

 

  File "/usr/lib/python2.7/dist-packages/mod_python/importer.py", line 1229, in _process_target

    result = _execute_target(config, req, object, arg)

 

  File "/usr/lib/python2.7/dist-packages/mod_python/importer.py", line 1128, in _execute_target

    result = object(arg)

 

  File "build/bdist.linux-x86_64/egg/trac/web/modpython_frontend.py", line 148, in handler

    pkg_resources.require('Trac==%s' % VERSION)

 

  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 725, in require

    needed = self.resolve(parse_requirements(requirements))

 

  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 633, in resolve

    requirements.extend(dist.requires(req.extras)[::-1])

 

  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2291, in requires

    dm = self._dep_map

 

  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2484, in _dep_map

    self.__dep_map = self._compute_dependencies()

 

  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2501, in _compute_dependencies

    from _markerlib import compile as compile_marker

 

ImportError: No module named _markerlib

[RjOllos]

On Friday, June 3, 2016 at 2:02:30 PM UTC-7, Aikido Guy wrote:

Thank you for all of your great suggestions! I appreciate them all ;)

Here is what I've tried and still have the error. Maybe there is something simple that I can do that I'm overlooking?

Kindly,

Aikido Guy

I guess I would try to reinstall Python using your package manager.

- Ryan 

[Aikido Guy]

Before I attempt to work through a python re-install, is there anything obviously wrong with the following? i.e. old and should be deleted? or has a known conflict?

> python -c "import sys; print('\n'.join(sys.path))"

 

/usr/local/lib/python2.7/dist-packages/Genshi-0.7-py2.7-linux-x86_64.egg

/usr/local/lib/python2.7/dist-packages/configobj-5.0.6-py2.7.egg

/usr/local/lib/python2.7/dist-packages/TracBib-Snapshot-py2.7.egg

/usr/local/lib/python2.7/dist-packages/TracDateField-1.0.2-py2.7.egg

/usr/local/lib/python2.7/dist-packages/TracMasterTickets-3.0.2-py2.7.egg

/usr/local/lib/python2.7/dist-packages/TracMathJax-0.2-py2.7.egg

/usr/local/lib/python2.7/dist-packages/graphviz-0.7.6dev-py2.7.egg

/usr/local/lib/python2.7/dist-packages/pytz-2014.9-py2.7.egg

/usr/local/lib/python2.7/dist-packages/TracTocMacro-11.0.0.3-py2.7.egg

/usr/local/lib/python2.7/dist-packages/TracWysiwyg-0.12.0.3_r10725-py2.7.egg

/usr/local/lib/python2.7/dist-packages/docutils-0.12-py2.7.egg

/usr/local/lib/python2.7/dist-packages/pysqlite-2.8.2-py2.7-linux-x86_64.egg

/usr/local/lib/python2.7/dist-packages/Pygments-1.4-py2.7.egg

/usr/local/lib/python2.7/dist-packages/Trac-1.0.11-py2.7.egg

/usr/local/lib/python2.7/dist-packages/pip-8.1.2-py2.7.egg

/usr/lib/python2.7

/usr/lib/python2.7/plat-x86_64-linux-gnu

/usr/lib/python2.7/lib-tk

/usr/lib/python2.7/lib-old

/usr/lib/python2.7/lib-dynload

/usr/local/lib/python2.7/dist-packages

/usr/lib/python2.7/dist-packages

/usr/lib/python2.7/dist-packages/PILcompat

/usr/lib/python2.7/dist-packages/gst-0.10

/usr/lib/python2.7/dist-packages/gtk-2.0

/usr/lib/pymodules/python2.7

/usr/lib/python2.7/dist-packages/ubuntu-sso-client

[Aikido Guy]

> apt-get install --reinstall python2.7

> python -c "import _markerlib"

did not solve the issue... continuing the hunt for a solution... fingers crossed!

[Dimitri Maziuk]

On 2016-06-03 16:50, Aikido Guy wrote:
> Before I attempt to work through a python re-install, is there anything
> obviously wrong with the following?

Do you actually have a python install in /usr/local/lib *and* in
/usr/lib? Or is that just your sys.path? If you have 2 python installs
anything might happen including the universe imploding.

Dimitri

[Aikido Guy]

Thank you for this observation. In fact, I essentially do "sudo apt-get install python2.7" so whatever that command does is what I have.

I did, however, follow up and do see python 3.4 is also installed. Therefore I went ahead with the "apt-get install --reinstall python2.7" and that seemed to be the correct way to solve the import _markerlib problem... not sure why.