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Asked: 2026-05-23T05:02:29+00:00

i m trying to capture ethernet packet using pycap http://pycap.sourceforge.net/ . when i use

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i m trying to capture ethernet packet using pycap http://pycap.sourceforge.net/. when i use following command on python prompt with root privileges, it is working

>>>import pycap.capture
>>>p = pycap.capture.capture("wlan0")
>>>p.next()
(Ethernet(type=0x608, 00:1b:b1:46:53:5d -> ff:ff:ff:ff:ff:ff), ARP(op=0x1, protocol=0x800,     00:1b:b1:46:53:5d (192.16.68.10) -> 00:00:00:00:00:00 (192.16.110.39)), '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00', 1307898356.222398)

But if i run these commands as a script, i m getting following error

>>>sudo python pycap.py
Traceback (most recent call last):
  File "pycap.py", line 2, in <module>
  from pycap import *
  File "/home/nikhil/Code/Python/pycap.py", line 5, in <module>
  p = capture.capture(device)
  NameError: name 'capture' is not defined

Any suggestions?
pycap http://pycap.sourceforge.net/ says it is requires python2.3 and im using python2.6. Is that a problem?

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1 Answer

  1. Editorial Team

    Your script using pycap is called pycap itself, so import pycap imports itself (. is usually the first directory on the import path). Because imports are caches, this doesn’t lead to infinite recursion but instead gives you a reference to your own module, which of course doesn’t define capture or anything else. Rename it.

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