pysender.py and pyreceiver.py do not work with pyhelics

[bpalmintier]

Describe the bug The pysender.py and pyreciever.py examples in the main HELICS repository do not work with the new pyhelics interface. This is problematic since the "Hello World" directions in the on-line documentation suggest copying the code from the main helics repo files and running, but the now preferred way to install helics for python through various channels uses pyhelics

What is the expected behavior? basic python example should work easily with consistent documentation

To Reproduce See above

Environment (please complete the following information):

• Operating System: all? Tested with Linux
• Language Extension: Python
• what compiler or setup process did you use: python helics installed using pip with pip install helics
• HELICS version: (reported by h.helicsGetVersion()) "2.6.1 (2020-10-15)"

Additional context and information

[bpalmintier]

Note: workaround is to use the pysender.py and pyreciever.py from the pyhelics repo (https://github.com/GMLC-TDC/pyhelics)

[kdheepak]

Hi @bpalmintier, can you clarify which files you used? And what was the error that occurred?

The files located here seem to work fine for me using pyhelics:

https://github.com/GMLC-TDC/HELICS-Examples/tree/master/python/pi-exchange

Screenshot of running on my Mac

[bpalmintier]

Ah... the documentation text at: https://docs.helics.org/en/latest/introduction/python.html does not include the broker as a separate python script. So the fix is either:

• The description there needs to add a note to launch the broker (and either link to that code in broker.py or notes on starting using helics_broker OR
• Adapt the code linked there for pisender.py (or receiver) to also launch the broker as found in the pyhelics repo version of these files.

(And ideally per #1823 would also be good to add, perhaps as a comment, options for chaning the IP address, port, and timeout of the broker)