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Python Parallel Port Extension

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This module encapsulates the access for the parallel port. It provides backends for Python running on Windows and Linux. Other platforms are possible too but not yet integrated.

This module is still under development. But it may be useful for developers. The Windows version needs a compiled extension and the giveio.sys driver for Windows NT/2k/XP. It uses ctypes to access functions in a prebuilt DLL.

It is released under a free software license, see LICENSE.txt for more details.

Copyright (C) 2001-2016 Chris Liechti



  • same class based interface on all supported platforms

  • port numbering starts at zero, no need to know the port name in the user program

  • port string (device name) can be specified if access through numbering is inappropriate


  • Python 2.2 or newer

  • “Java Communications” (JavaComm) extension for Java/Jython


Extract files from the archive, open a shell/console in that directory and let Distutils do the rest:

$ python install

Short introduction

>>> import parallel
>>> p = parallel.Parallel()  # open LPT1 or /dev/parport0
>>> p.setData(0x55)


Please look in the GIT Repository. There is an example directory where you can find a simple terminal and more.


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