#To define a particular parameter, replace the 'parameterName' inside itsm.getParameter('parameterName') with that parameter's name
import os
content=r'''
# Copyright (c) 1993-2009 Microsoft Corp.
 #
 # This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
 #
 # This file contains the mappings of IP addresses to host names. Each
 # entry should be kept on an individual line. The IP address should
 # be placed in the first column followed by the corresponding host name.
 # The IP address and the host name should be separated by at least one
 # space.
 #
 # Additionally, comments (such as these) may be inserted on individual
 # lines or following the machine name denoted by a '#' symbol.
 #
 # For example:
 #
 #      102.54.94.97     rhino.acme.com          # source server
 #       38.25.63.10     x.acme.com              # x client host
 # localhost name resolution is handle within DNS itself.
 #       127.0.0.1       localhost
 #       ::1             localhost

'''
if os.path.exists('C:\Windows\System32\drivers\etc\hosts'):
    print 'Before Change: '
    with open('C:\Windows\System32\drivers\etc\hosts') as r:
        print r.read()
with open('C:\Windows\System32\drivers\etc\hosts', 'w') as f:
    f.write('\n')
    f.write(content)
print '\n\n\n'
print 'After Change: '
with open('C:\Windows\System32\drivers\etc\hosts') as r:
    print r.read()