[Python] Python Socket gives "[Errno 24] Too many open files"

I have the following UDP class sending arrays of data at about 100Hz

from six import string_types
import socket
import struct

def convert_data(iterable):
if isinstance(iterable, string_types):
return str(iterable)
data = tuple(iterable)
format = "{0}H".format(len(data))
print("Sending data:", format, data)
if max(data) > 2**16 - 1:
raise ValueError(max(data))
if min(data) < 0:
raise ValueError(min(data))
return struct.pack(format, *data)

class UDP(object):
def __init__(self, ip, port):
self._ip = ip
self._port = port
self.socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
self.socket.connect((ip, port))

def send_data(self, data):
message = convert_data(data)
return self.socket.sendall(message)


It gives the following error after successfully sending for about a minute:

Traceback (most recent call last):
File "take_analogue_data.py", line 13, in <module>
File "take_analogue_data.py", line 8, in main
File "/home/pi/nio-integration/hardware/raspi/UDP.py", line 22, in __init__
File "/usr/lib/python2.7/socket.py", line 187, in __init__
socket.error: [Errno 24] Too many open files


I have looked for a solution. This Stack Overflow answer suggests increasing the number of possible files. I really don't think this is the solution I am looking for though.

Is there something I can do? I was thinking that closing the connection each time might work, but I have already played around with a bunch of things. (I have tried send, sendall, and sendto -- none have worked)

Note: I am running Python2.6 on Raspbian Wheezy on a Raspberry Pi

Edit Another module is sending the data. It could look something like

import UDP
udp = UDP.UDP(IP, PORT)
while(True):
udp.send_data(range(8))
sleep(0.01)

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