community 
Python Incompatibility - Spirent STC 2G Shell
Hi @Yoram Shamir, I tried to use the Spirent Chassis 2G shell recently on a project and encountered an issue while attempting to add a Spirent Chassis via the CloudShell portal (v2020.1):
Discovery failed for resource 'Spirent Chassis 11U': 'get_inventory' command failed with 'General Execution' error. Description: Failed to start execution: Unexpected error - requested contract method raised unknown fault of type SyntaxError. original error: invalid syntax (tgn_utils.py, line 71). The resource is now excluded.
Basically, the shell zip file 'Spirent.TestCenter.Controller.Shell.2G.zip' file available at this link installs Python 3 dependencies though the shell is written to execute using Python 2:
The version of tgn_utils.py installed uses a function annotation -> at line 71 and this was incompatible with the shell version available in the Quali Community repo.
My work colleague advised of a fix which required updating the requirements file found in the shell so it uses pytrafficgen<3.0 and this ensures python 2 dependencies are installed.
I can see the version of the shell on GitHub is set up to use python 3 and so this may be up to date. Please can you update the downlink link for the 'Spirent.TestCenter.Controller.Shell.2G.zip' file so it's using the latest/working release?
This is critical for TSI customers as well.
Hi,
It looks like the python version of the driver is set to Python 2.
Please change it to Python 3 and try again.
