Python crashed when importing SOAPpy, printing out 'usage:copy source destination'

[jiang.haiyun at gmail.com]

Hello all,
when i import SOAPpy, the python crashed and print out 'usage:copy
source destination'.
As follows:
############################
haiyun# python
Python 2.4.1 (#2, Mar 28 2006, 21:00:14)
[GCC 3.4.2 [FreeBSD] 20040728] on freebsd5
Type "help", "copyright", "credits" or "license" for more information.
>>> import SOAPpy
usage:copy source destination
#############################
Then i checked and found that in my pwd there is a .py file,
i guess it is this file caused the problem.
the file content is as follows:
############################
haiyun# cat a.py
#!env python
usage="usage:copy source destination\n"
import sys
len=len(sys.argv)
if len!=3 :
        print usage
        sys.exit()
################end#########

So the python will crash when i import SOAPpy if working in a dir
containing this .py file,
and if rename the .py file to another type , say .txt, the problem
dispeared.

Who can tell me what's the problem.