old_contents: # This is the blocking Get Poetry Now! client.
  
  import datetime, optparse, socket
  
  
  def parse_args():
      usage = """usage: %prog [options] [hostname]:port ...
  
  This is the Get Poetry Now! client, blocking edition.
  Run it like this:
  
    python get-poetry.py port1 port2 port3 ...
  
  If you are in the base directory of the twisted-intro package,
  you could run it like this:
  
    python blocking-client/get-poetry.py 1001 1002 1003
  
  to grab poetry from servers on ports 1001, 1002, and 1003.
  
  Of course, there need to be servers listening on those ports
  for that to work.
  """
  
      parser = optparse.OptionParser(usage)
  
      _, addresses = parser.parse_args()
  
      if not addresses:
          print parser.format_help()
          parser.exit()
  
      def parse_address(addr):
          if ':' not in addr:
              host = ''
              port = addr
          else:
              host, port = addr.split(':', 1)
  
          if not port.isdigit():
              parser.error('Ports must be integers.')
  
          return host, int(port)
  
      return map(parse_address, addresses)
  
  
  def get_poetry(address):
      """Download a piece of poetry from the given address."""
  
      sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
      sock.connect(address)
  
      poem = ''
  
      while True:
  
          # This is the 'blocking' call in this synchronous program.
          # The recv() method will block for an indeterminate period
          # of time waiting for bytes to be received from the server.
  
          bytes = sock.recv(1024)
  
          if not bytes:
              break
  
          poem += bytes
  
      return poem
  
  
  def format_address(address):
      host, port = address
      return '%s:%s' % (host or 'localhost', port)
  
  
  def main():
      addresses = parse_args()
  
      elapsed = datetime.timedelta()
  
      for i, address in enumerate(addresses):
          addr_fmt = format_address(address)
  
          print 'Task %d: get poetry from: %s' % (i + 1, addr_fmt)
  
          start = datetime.datetime.now()
  
          # Each execution of 'get_poetry' corresponds to the
          # execution of one synchronous task in Figure 1 here:
          # http://dpeticol.webfactional.com/blog/?p=1209#figure1
  
          poem = get_poetry(address)
  
          time = datetime.datetime.now() - start
          print 'Task %d: got a poem from %s in %s' % (i + 1, addr_fmt, time)
          elapsed += time
  
      print 'Got %d poems in %s' % (len(addresses), elapsed)
  
  
  if __name__ == '__main__':
      main()
  
new_contents: # This is the blocking Get Poetry Now! client.
  
  import datetime, optparse, socket
  
  
  def parse_args():
      usage = """usage: %prog [options] [hostname]:port ...
  
  This is the Get Poetry Now! client, blocking edition.
  Run it like this:
  
    python get-poetry.py port1 port2 port3 ...
  
  If you are in the base directory of the twisted-intro package,
  you could run it like this:
  
    python blocking-client/get-poetry.py 1001 1002 1003
  
  to grab poetry from servers on ports 1001, 1002, and 1003.
  
  Of course, there need to be servers listening on those ports
  for that to work.
  """
  
      parser = optparse.OptionParser(usage)
  
      _, addresses = parser.parse_args()
  
      if not addresses:
          print parser.format_help()
          parser.exit()
  
      def parse_address(addr):
          if ':' not in addr:
              host = ''
              port = addr
          else:
              host, port = addr.split(':', 1)
  
          if not port.isdigit():
              parser.error('Ports must be integers.')
  
          return host, int(port)
  
      return map(parse_address, addresses)
  
  
  def get_poetry(address):
      """Download a piece of poetry from the given address."""
  
      sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
      sock.connect(address)
  
      poem = ''
  
      while True:
  
          # This is the 'blocking' call in this synchronous program.
          # The recv() method will block for an indeterminate period
          # of time waiting for bytes to be received from the server.
  
          bytes = sock.recv(1024)
  
          if not bytes:
              break
  
          poem += bytes
  
      return poem
  
  
  def format_address(address):
      host, port = address
      return '%s:%s' % (host or 'localhost', port)
  
  
  def main():
      addresses = parse_args()
  
      elapsed = datetime.timedelta()
  
      for i, address in enumerate(addresses):
          addr_fmt = format_address(address)
  
          print 'Task %d: get poetry from: %s' % (i + 1, addr_fmt)
  
          start = datetime.datetime.now()
  
          # Each execution of 'get_poetry' corresponds to the
          # execution of one synchronous task in Figure 1 here:
          # http://dpeticol.webfactional.com/blog/?p=1209#figure1
  
          poem = get_poetry(address)
  
          time = datetime.datetime.now() - start
  
          msg = 'Task %d: got %d bytes of poetry from %s in %s'
          print  msg % (i + 1, len(poem), addr_fmt, time)
  
          elapsed += time
  
      print 'Got %d poems in %s' % (len(addresses), elapsed)
  
  
  if __name__ == '__main__':
      main()
  
subject: Adjust blocking client output.