docs: def execute(paramPath, executable='pParse.exe'):
      """Execute pParse with the specified parameter file.
  
      :param paramPath: location of the pParse parameter file
      :param executable: must specify the complete file path of the pParse.exe
          if its location is not in the ``PATH`` environment variable.
  
      :returns: :func:`subprocess.Popen` return code, 0 if pParse was executed
          successful
      """
      procArgs = [executable, paramPath]
  
      ## run it ##
      proc = subprocess.Popen(procArgs, stderr=subprocess.PIPE)
  
      ## But do not wait till netstat finish, start displaying output immediately ##
      while True:
          out = proc.stderr.read(1)
          if out == '' and proc.poll() != None:
              break
          if out != '':
              sys.stdout.write(out)
              sys.stdout.flush()
  
      return proc.returncode