old_contents: __version__ = "4.0b1"
  __build__ = "GIT_COMMIT"
  try:
      import logging
      import subprocess
      import os
      import platform
      FNULL = open(os.devnull, 'w')
      if platform.system() == "Windows":
          args = ['git', 'describe', '--tags']
      else:
          args = ['git describe --tags']
      git_revision = subprocess.check_output(args,
      #git_revision = subprocess.check_output(['pwd'],
                      stderr=FNULL,
                      shell=True)
      __build__ = str(git_revision).strip()
  except subprocess.CalledProcessError as cpe:
      logging.warning("Error while determining build number\n  Using command:\n %s \n Output:\n %s"% (cpe.cmd,cpe.output))
  
new_contents: __version__ = "4.0b1"
  __build__ = "GIT_COMMIT"
  try:
      import logging
      import subprocess
      import os
      import platform
      FNULL = open(os.devnull, 'w')
      if platform.system() == "Windows":
          args = ['git', 'describe', '--tags']
      else:
          args = ['git describe --tags']
      git_revision = subprocess.check_output(args,
                      stderr=FNULL,
                      shell=True)
      __build__ = str(git_revision).strip()
  except subprocess.CalledProcessError as cpe:
      logging.warning("Error while determining build number\n  Using command:\n %s \n Output:\n %s"% (cpe.cmd,cpe.output))
  
subject: Clean up un-needed commented line after jkrzywon fixed subprocess bad behaviour