Python packet capture utility

[VYAS ASHISH M-NTB837]

Dear All

I want to capture tcp packets in python. I need to do this on both
Windows and Linux on python3.1

I came across the following:
http://sourceforge.net/projects/pycap/
http://sourceforge.net/projects/pylibpcap/
http://code.google.com/p/pypcap/
http://oss.coresecurity.com/projects/pcapy.html


I am not able to evaluate on my own. Which one should I pick up?
Priority is python3.1 support on both windows and Linux. I don't have to
do many/complex operations. If it is not so programmer friendly I am OK.

Also let me know if 2to3 would help here if there is not python3
support.

Regards
Ashish