[SOLVED] installation check

shanky · 10-19-2011, 07:04 AM

hii
i am working on ns3 and to use the visualizer i had installed some packages before hand,even then the console shows me some errors when i run the code telling me no module named pyvizgraph, which it should not as these were the required packages.How should i check whether the packages has been installed CORRECTLY or not?
these were the packages i have installed
python-devel
gnome-python2
gnome-python2-gnomedesktop
gnome-python2-rsvg
graphviz-python
pygoocanvas
python-kiwi
i have referred to this page http://www.nsnam.org/wiki/index.php/PyViz

thanks in advance

jrhorn424 · 10-19-2011, 07:56 AM

Those are the dependencies, at least. Did you try the following?

Code:

 pip install pyvizgraph

Or if pip is not installed:

Code:

easy_install pyvizgraph

You might need to be root for these to install correctly.

To answer your specific question, you could enter the python interpreter and then try loading the module. If the module doesn't load, it isn't installed. To do it on a single line from the command line, try:

Code:

python -c 'import pyvizgraph'

Since it isn't installed on my system, I get the following message:

Code:

jrhorn424@hook:~ 2011-10-19 09:00:03 
>> python -c 'import pyvizgraph'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named pythongraphviz

shanky · 10-19-2011, 08:43 AM

i did as you said used python -c 'import pythongraphviz'
and i got the same result
Traceback (most recent call last):
File "<string>", line 1, in <module>
ImportError: No module named pythongraphviz

To cross check i gave yum list graphviz-python i got
Installed Packages
graphviz-python.i586 2.20.3-3.fc11 installed

Then again i gave python -c 'import graphviz-python' the console showed
File "<string>", line 1
import graphviz-python
^
SyntaxError: invalid syntax

What does this mean??
Really confused!!!

jrhorn424 · 10-19-2011, 09:10 AM

'graphviz-python' are likely the python bindings for graphviz, which (I believe) is a separate piece of software. Did you try installing the module?

Please try installing pyvizgraph with either pip or easy_install, as I recommended previously. This is the error your OP mentioned. I should have asked you to check:

Code:

python -c 'import pyvizgraph'

knudfl · 10-19-2011, 10:43 AM

The Fedora packages graphviz-python (and python-networkx),
which should provide the module pygraphviz seem to be incomplete.
( Or is something else than a genuine "pygraphviz-1.1" :
The Fedora graphviz-python is version 2.2x.x ).
EDIT: pygraphviz-1.1 is only available for CentOS6 ("Fedora 12"),
CentOS5 ("Fedora 6") e.g. python-pygraphviz-1.1-2.el6.rf.i686.rpm

A manual install of pygraphviz-1.1(.tar.gz) will fix the issue.
http://pypi.python.org/packages/sour...e29135e93b2461
Also required : # yum install graphviz-devel

cd pygraphviz-1.1/ ; su ; python setup.py install

The command
./waf --pyrun src/flow-monitor/examples/wifi-olsr-flowmon.py --visualize
will now open the 'Visualize GUI'. Tested with ns3 version 3.12.1 :
http://www.nsnam.org/release/ns-allinone-3.12.1.tar.bz2
http://www.nsnam.org/

..

shanky · 10-22-2011, 03:52 AM

hiii sry for getting back so late !! but the visualizer is working..thanks a lot everyone ..its a huge relief