Python - Library Problems

#! /usr/bin/env python

import sys
from scapy import sr1,IP,ICMP

p=sr1(IP(dst=sys.argv[1])/ICMP())
if p:
    p.show()

Traceback (most recent call last):
  File "test.py", line 4, in <module>
    from scapy import sr1,IP,ICMP
ImportError: cannot import name sr1

>>> import scapy
>>> dir(scapy)

>>> import scapy
>>> help(scapy)

>>> import scapy
>>> from pprint import pformat
>>> pformat(dir(scapy))

from scapy.all import *

from scapy import *

coventry@metta:~/src$ wget -q http://www.secdev.org/projects/scapy/files/scapy-latest.zip
coventry@metta:~/src$ unzip -qq scapy-latest.zip
warning [scapy-latest.zip]:  61 extra bytes at beginning or within zipfile
  (attempting to process anyway)
coventry@metta:~/src$ find scapy-2.0.0.10 -name *.py | xargs grep sr1
scapy-2.0.0.10/scapy/layers/dns.py:    r=sr1(IP(dst=nameserver)/UDP()/DNS(opcode=5,
scapy-2.0.0.10/scapy/layers/dns.py:    r=sr1(IP(dst=nameserver)/UDP()/DNS(opcode=5,
scapy-2.0.0.10/scapy/layers/inet6.py:from scapy.sendrecv import sr,sr1,srp1
scapy-2.0.0.10/scapy/layers/snmp.py:            r = sr1(IP(dst=dst)/UDP(sport=RandShort())/SNMP(community=community, PDU=SNMPnext(varbindlist=[SNMPvarbind(oid=oid)])),timeout=2, chainCC=1, verbose=0, retry=2)
scapy-2.0.0.10/scapy/layers/inet.py:from scapy.sendrecv import sr,sr1,srp1
scapy-2.0.0.10/scapy/layers/inet.py:            p = sr1(IP(dst=target, options="x00"*40, proto=200)/"XXXXYYYYYYYYYYYY",timeout=timeout,verbose=0)
scapy-2.0.0.10/scapy/sendrecv.py:def sr1(x,filter=None,iface=None, nofilter=0, *args,**kargs):