Description

The Python3 modules violate Python's exception handling contract.

Troubleshooting

Reproduction

KSR.pc.sets("$fU",None)

Debugging Data

Unhandled exception in the Python code:
TypeError: kemi-param-ss() argument 2 must be str, not None

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/local/lib/python3.11/dist-packages/kamailio/trace.py", line 212, in pac
    return proc(*a, **k)
           ^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/dist-packages/kamailio/_basic.py", line 181, in ksr_request_route
    self.do_route(msg)
  File "/usr/local/lib/python3.11/dist-packages/kamailio/_basic.py", line 261, in do_route
    self.route_static(msg)
  File "/usr/local/lib/python3.11/dist-packages/kamailio/_basic.py", line 287, in route_static
    if self.fix_addrs(msg):
       ^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/dist-packages/kamailio/_basic.py", line 334, in fix_addrs
    PV.tU = dnr
    ^^^^^
  File "/usr/local/lib/python3.11/dist-packages/kamailio/var.py", line 46, in __setattr__
    return self.__setitem__(k, v)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/dist-packages/kamailio/var.py", line 73, in __setitem__
    KSR.pv.sets("$fU", v)
SystemError: <built-in function sets> returned a result with an exception set

Possible Solutions

See PR #4044

Additional Information

• Kamailio Version - output of kamailio -v

seen with 5.6 and 5.8

• Operating System:

Debian Stable but doesn't matter

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