failed_client.py

from gevent import monkey; monkey.patch_all()
import socket
from threading import Thread
import time
import struct

ADDR = ('localhost', 8125)

closed = False

def server():
  global closed

  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

  s.bind(ADDR)
  s.listen(1)
  conn, addr = s.accept()
  conn.setsockopt(socket.SOL_SOCKET, socket.SO_LINGER, struct.pack('ii', 1, 0))
  print 'accepted'
  data = conn.recv(1024)
  print 'received %s' % data

  conn.shutdown(socket.SHUT_RD)
  conn.close()
  closed = True

def client():
  client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  client.connect( ADDR )

  print 'sending abc'
  bc = client.send('abc')
  print 'sent %d bytes' % bc

  while not closed:
    time.sleep(1)

  print 'sending 123'
  client.send('123')

t1 = Thread(target=server, args=())
t2 = Thread(target=client, args=())

t1.start()
t2.start()
t1.join()
t2.join()