The PYTHON - based OPC program that is downloaded on GITHUB should be no problem,

Filename	Size	Update
opcua-modeler-master
opcua-modeler-master\.gitignore	116	2017-07-02
opcua-modeler-master\.travis.yml	572	2017-07-02
opcua-modeler-master\LICENSE	35142	2017-07-02
opcua-modeler-master\Makefile	216	2017-07-02
opcua-modeler-master\README.md	2136	2017-07-02
opcua-modeler-master\app.py	75	2017-07-02
opcua-modeler-master\example.xml	3581	2017-07-02
opcua-modeler-master\release.py	1112	2017-07-02
opcua-modeler-master\screenshot.png	261230	2017-07-02
opcua-modeler-master\setup.py	501	2017-07-02
opcua-modeler-master\tests.py	5998	2017-07-02
opcua-modeler-master\uamodeler
opcua-modeler-master\uamodeler\model_manager.py	7053	2017-07-02
opcua-modeler-master\uamodeler\namespace_widget.py	4497	2017-07-02
opcua-modeler-master\uamodeler\refnodesets_widget.py	3100	2017-07-02
opcua-modeler-master\uamodeler\server_manager.py	5446	2017-07-02
opcua-modeler-master\uamodeler\uamodeler.py	19816	2017-07-02
opcua-modeler-master\uamodeler\uamodeler_ui.py	12538	2017-07-02
opcua-modeler-master\uamodeler\uamodeler_ui.ui	9715	2017-07-02

• We are an exchange download platform that only provides communication channels. The downloaded content comes from the internet. Except for download issues, please Google on your own.
• The downloaded content is provided for members to upload. If it unintentionally infringes on your copyright, please contact us.
• Please use Winrar for decompression tools
• If download fail, Try it againg or Feedback to us.
• If downloaded content did not match the introduction, Feedback to us，Confirm and will be refund.
• Before downloading, you can inquire through the uploaded person information

Nothing．