Execute Ping Sweep from IDE console and output results to .txt file

ping_sweep.py

"""
Program: Execute Ping Seep (ICMP Requests) and output results to a text file.
Interpreter Python 2.7 | Linux 
"""

import os
import platform
from datetime import datetime

net = raw_input("Enter the IP address")
net1 = net.split('.')
a = '.'
net2 = net1[0] + a + net1[1] + a + net1[2] + a
st1 = int(raw_input("Enter the Starting Number "))
en1 = int(raw_input("Enter the Last Number "))
en1 = en1 + 1
oper = platform.system()

if oper == "Windows":
    ping1 = "ping -n 1 "
elif oper == "Linux":
    ping1 = "ping -c 1 "
else:
    ping1 = "ping -c 1 "
t1 = datetime.now()
print "Scanning in Progress"
for ip in xrange(st1, en1):
    addr = net2 + str(ip)
    comm = ping1 + addr
    response = os.popen(comm)

    print response.readlines()
    for item in response.readlines():
        f = open('pingSweep.txt', 'a')
        f.write(item)
        f.close()
    list1 = response.readlines()[:]

    for line in list1:
        if line.count("TTL"):
            print "hello "
            print addr, "--> Live"
            break


t2 = datetime.now()
total = t2 - t1
print "scanning complete in ", total