"NoneType' object has no attribute 'group'" error when using jsonrpc.py with RADIUS MGMT on 22.7 and greater

[tizzet]

When using the jasonrpc.py script with RADIUS MGMT enabled on EXOS version 22.7 and greater, the following error/output is seen:

Enter remote system IP address: 10...**
Enter remote system username: administrator
Remote system password:
Enter EXOS cli: save
JSONRPC Response for: save

---

{
"id": 1,
"jsonrpc": "2.0",
"result": {
"error": "error processing command save 'NoneType' object has no attribute 'group'"
}
}

Downgrading switch to 22.6 produces correct results (with RADIUS MGMT enabled):

Enter remote system IP address: 10...**
Enter remote system username: administrator
Remote system password:
Enter EXOS cli: save
JSONRPC Response for: save

---

{
"id": 1,
"jsonrpc": "2.0",
"result": [
{
"CLIoutput": "The configuration file ty_jsoncli.cfg already exists.\nSaving configuration ty_jsoncli.cfg on master ....... done!\nConfiguration saved to ty_jsoncli.cfg successfully.\n"
},
{
"status": "SUCCESS",
"useConfig": {
"msmAName": "ty_jsoncli.cfg",
"msmBName": null,
"name": "ty_jsoncli",
"switchPortInitMode": 0
}
}
]
}

Formatted CLIoutput Display

---

The configuration file ty_jsoncli.cfg already exists.
Saving configuration ty_jsoncli.cfg on master ....... done!
Configuration saved to ty_jsoncli.cfg successfully.

---

-tested with python 3.6
-issue also seen in EXOS 30.x
-issue only seen when radius mgmt access is used on v22.7 and greater
-any show or commit command produces 'NoneType' object has no attribute 'group' error
-authentication valid
-submitting issue here to help rule out script as potential issue

X460G2-24t-G4.13 # sh log
05/13/2020 23:09:20.52 Info:AAA.authPass Login passed for user administrator through app (10...**)

Module aaa configuration.

configure radius mgmt-access primary server 10...** 1812 client-ip 10...** vr VR-Mgmt
configure radius mgmt-access primary shared-secret encrypted "#################"
enable radius mgmt-access

Steps to reproduce:

1. Load switch switch EXOS 22.7 or greater
2. Configure switch for RADIUS MGMT authentication
3. Run jsoncli.py against switch

[mgherm]

I was getting the same error message when using the JsonRPC.cli method from jsonrpc.py, albeit with a different configuration. In my case, passing "params" as a list instead of a string fixed the error. The comments say you can pass a single command as a string, but this is incorrect.