title: Serial communication over USB converter in Python - how to aproach this?
body: <p>A python program needs to accept a string every second from a serial port. I plan on using a RS-232 to USB converter. The application is going to work under Ubuntu 10.04.</p>
  
  <p>How do I approach this? Do I use <a href="http://pyserial.sourceforge.net/" rel="nofollow">pySerial</a> or <a href="http://www.libusb.org/" rel="nofollow">libusb</a>?</p>
  
  <p>There needs to be done some processing in the meantime, so synchronous communication is not viable. Do I use some kind of interrupts or do I need to open separate threads? Or do I use blocking reads, believing that 1s is enough for my computations (it is plenty ... for now)? </p>
  
  <p>I know, <em>RTFM</em>, but heading in the correct direction from the start will save me a lot of time! Thanks for bearing with me.</p>