Hi Robert1,

The old web libraries used an undocumented private protocol specific to the javascript languages.
So it is not a good idea to try to reverse engineering that protocol in order to apply it to other languages.
For example the LS_Phase is a very specific element of the javascript protocol used to recognize possible duplicate replies but which do not make sense in other languages.

For your python client you should implement the TLCP protocol version 2.0.0: https://sdk.lightstreamer.com/ls-gen...ifications.pdf
Something like this example do: https://github.com/Lightstreamer/Lig...thon/tree/v1.1
Indeed there is a new ready made python client library but that requires a Lightstreamer server 7.x.

Please also note you should make sure if the server you are targeting is enabled to accept requests for the TLCP protocol.

Regards,
Giuseppe