'import IN' in python
<p>I found a python programm, this program use:</p>

<pre><code>import IN
</code></pre>

<p>But when I try to run it, it says to me: No module named 'IN'
Im looking for a librarie named of this way but nothing appears.  Im using python 3.5 for windows.  I would appreciate answers.</p>

<p>The code is next:</p>

<pre><code>import IN
import socket, sys
s=socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

MAX=65535
PORT=9999

if len(sys.argv)!=2:
    print (sys.stderr, 'usage: sender.py host')
    sys.exit(2)

hostname=sys.argv[1]
s.connect((hostname,PORT))
s.setsockopt(socket.IPPROTO_IP, IN.IP_MTU_DISCVER, IN.IP_PMTUDISC_D0)
try:
    s.send('#'*65000)
except socket.error:
    print ('The message did not make it')
    option=getattr(IN, 'IP_MTU',14)
    print('MTU:', s.getsockopt(socket.IPPROTO_IP, option))
else:
    print ('MTU:', s.getsockopt(socket.IPPROTO_IP, option))
</code></pre>