I recently tried to upgrade python 2.7.9 to 3.4 but i probably have messed it up.

bash-4.2# python
ImportError: No module named site
bash-4.2# python -v
# installing zipimport hook
import zipimport # builtin
# installed zipimport hook
ImportError: No module named site
# clear __builtin__._
# clear sys.path
# clear sys.argv
# clear sys.ps1
# clear sys.ps2
# clear sys.exitfunc
# clear sys.exc_type
# clear sys.exc_value
# clear sys.exc_traceback
# clear sys.last_type
# clear sys.last_value
# clear sys.last_traceback
# clear sys.path_hooks
# clear sys.path_importer_cache
# clear sys.meta_path
# clear sys.flags
# clear sys.float_info
# restore sys.stdin
# restore sys.stdout
# restore sys.stderr
# cleanup __main__
# cleanup[1] zipimport
# cleanup[1] signal
# cleanup[1] exceptions
# cleanup[1] _warnings
# cleanup sys
# cleanup __builtin__
# cleanup ints: 5 unfreed ints
# cleanup floats
bash-4.2# python --version
Python 2.7.9

i tried both slackbuild and source code from the official python site!
do you have any suggestions?

You're on slackware. Get onto alien bob's site as he has several python modules for download

Well not exactly.
I have a small amount of python modules available but those are all for Slackware's python2. The OP has attempted to upgrade to python3 and that is mostly incompatible with everything in Slackware.

It would have been better to keep Slackware's python2 and install python3 in parallel.

Eric

How exactly can i do that? is any restore package available for that or any way to do it?

remove python and reinstall Slackware's Python and use SBo's python3 package

2 members found this post helpful.

As Willy suggests, remove the existing python package and install the stock python package and python3 from Slackbuilds.org.

If you're into python development, I suggest you learn virtualenv (+ virtualenvwrapper, both available from slackbuilds.org) to manage your python environment and for adding additional modules (with pip).

Or as an alternative have a look at either conda or miniconda. I use the latter for my python development as I find it far easier to deal with than virtualenv for things that don't get installed through pip.