warvariuc

#!/usr/bin/env python3

"""
A pure Python "ping" implementation, based on a rewrite by Johannes Meyer,
of a script originally by Matthew Dixon Cowles. Which in turn was derived
from "ping.c", distributed in Linux's netkit. The version this was forked
out of can be found here: https://gist.github.com/pklaus/856268
 
I've rewritten nearly everything for enhanced performance and readability,
and removed unnecessary functions (assynchroneous PingQuery and related).

warvariuc

# "Understanding Python's closures".
#
# Tested in Python 3.1.2
#
# General points:
#
#    1. Closured lexical environments are stored
#       in the property __closure__ of a function
#
#    2. If a function does not use free variables