CFD Online Discussion Forums - [PyFoam] install: "PYTHONPATH is not set"?

hi
when I write pyFoamVersion.py is terminal :
Code:
sajad@sajad-pc:~/PyFoam$ pyFoamVersion.py

Machine info: Linux | sajad-pc | 2.6.32-66-generic-pae | #132-Ubuntu SMP Mon Sep 1 18:51:21 UTC 2014 | i686 | 



Python version: 2.6.5 (r265:79063, Feb 27 2014, 19:44:14) 

[GCC 4.4.3]



Python executable: /usr/bin/python



PYTHONPATH is not set



Location of this utility: /usr/local/bin/pyFoamVersion.py



 PyFoam WARNING on line 175 of file /usr/local/lib/python2.6/dist-packages/PyFoam/FoamInformation.py : Basedir /home/sajad/foam for fork extend does not exist or is not a directory 

Version (2, 0, 1) Fork openfoam of the installed 2 versions:

openfoam-201 : /opt/openfoam201

openfoam-210 : /opt/openfoam210



pyFoam-Version: 0.6.3



Path where PyFoam was found (PyFoam.__path__) is ['/usr/local/lib/python2.6/dist-packages/PyFoam']



Configuration search path: [('file', '/etc/pyFoam/pyfoamrc'), ('directory', '/etc/pyFoam/pyfoamrc.d'), ('file', '/home/sajad/.pyFoam/pyfoamrc'), ('directory', '/home/sajad/.pyFoam/pyfoamrc.d')]

Configuration files (used): []



Installed libraries:

cython               :  No      Not used. Maybe will by used later to spped up parts of PyFoam 

cProfile             :  Yes 

docutils             :  No      Not necessary. Needed for RestructuredText to HTML conversion 

Gnuplot              :  No      Not a problem. Version from ThirdParty is used 

hotshot              :  Yes 

ipdb                 :  No      Not necessary. Only makes debugging more comfortable 

IPython              :  No      Not necessary. But the interactive shell may be more comfortable 

matplotlib           :  No      Only Gnuplot-plotting possible 

mercurial            :  No      Not a problem. Used for experimental case handling 

nose                 :  No      Only needed for running the unit-tests (developers only) 

Numeric              :  No      Not supported anymore. No need to install it 

numpy                :  Yes      version: 1.3.0 

openpyxl             :  No      Not a problem. Only used for exporting pandas-data to Excel-files (advanced) 

pandas               :  No      Not a problem. Only used for handling of advanced data-handling 

ply                  :  No      Not a problem. Version from ThirdParty is used 

profile              :  No      Not a problem. Can't profile using this library 

psyco                :  Yes      version: 17170672 

PyQt4                :  No      Only some experimental GUI-stuff relies on this 

PyQt4.Qwt5           :  No      Only an alternate plotting back-end 

scipy                :  No      Not yet used. Possibly use signal-fitting etc 

Tkinter              :  No      Not a problem. Used for the old version of DisplayBlockmesh and some matplotlib-implementations 

twisted              :  Yes      version: 10.0.0 

vtk                  :  No      Not a problem. Only used for some utilities 

xlwt                 :  No      Not a problem. Only used for exporting pandas-data to Excel-files 



Library locations

cProfile             : /usr/lib/python2.6/cProfile.pyc

hotshot              : /usr/lib/python2.6/hotshot/__init__.pyc

numpy                : /usr/lib/python2.6/dist-packages/numpy/__init__.pyc

psyco                : /usr/lib/python2.6/dist-packages/psyco/__init__.pyc

twisted              : /usr/lib/python2.6/dist-packages/twisted/__init__.pyc

sajad@sajad-pc:~/PyFoam$ ^C
in line 7 that I highlighted it red it is write 'PYTHONPATH is not set'
my question is this an error?is this a problem?if yes how can I set PYTHONPATH?