docs: def main(args=None):
      """ Output information about `streamsx` and the environment.
     
          Useful for support to get key information for use of `streamsx`
          and Python in IBM Streams.
      """
      _parse_args(args)
      streamsx._streams._version._mismatch_check('streamsx.topology.context')
      srp = pkg_resources.working_set.find(pkg_resources.Requirement.parse('streamsx'))
      if srp is not None:
          srv = srp.parsed_version
          location = srp.location
          spkg = 'package'
      else:
          srv = streamsx._streams._version.__version__
          location = os.path.dirname(streamsx._streams._version.__file__)
          location = os.path.dirname(location)
          location = os.path.dirname(location)
          tk_path = (os.path.join('com.ibm.streamsx.topology', 'opt', 'python', 'packages'))
          spkg = 'toolkit' if location.endswith(tk_path) else 'unknown'
  
      print('streamsx==' + str(srv) + ' (' + spkg + ')')
      print('  location: ' + str(location))
      print('Python version:' + str(sys.version))
      print('PYTHONHOME=' + str(os.environ.get('PYTHONHOME', 'unset')))
      print('PYTHONPATH=' + str(os.environ.get('PYTHONPATH', 'unset')))
      print('PYTHONWARNINGS=' + str(os.environ.get('PYTHONWARNINGS', 'unset')))
      print('STREAMS_INSTALL=' + str(os.environ.get('STREAMS_INSTALL', 'unset')))
      print('JAVA_HOME=' + str(os.environ.get('JAVA_HOME', 'unset')))
      return 0