new_contents: from __future__ import absolute_import
  from __future__ import print_function
  
  import platform
  
  from . import __version__
  
  
  def print_versions():
      versions = [
          ("myhdl", __version__),
          ("Python Version", platform.python_version()),
          ("Python Implementation", platform.python_implementation()),
          ("OS", platform.platform()),
      ]
  
      print()
      print("INSTALLED VERSIONS")
      print("------------------")
      for k, v in versions:
          print("{}: {}".format(k, v))
  
  
  if __name__ == "__main__":
      print_versions()
  
subject: add simple debug info module