[Python-modules-team] Bug#962952: azure-cli: exception when connecting to azure services

[Luca Boccassi]

On Fri, 2020-07-10 at 16:15 +0200, Jakub Wilk wrote:
> * Luca Boccassi <bluca at debian.org>, 2020-07-10, 09:54:
> > (note that the monitor functionality is but one of the many features
> > and subcommands, hence the downgrade in severity).
> 
> It's not just the monitor functionality, whatever that is.
> All the "az vm" commands are broken, e.g.:
> 
>    $ az vm list
>    The command failed with an unexpected error. Here is the traceback:
> 
>    No module named 'antlr4'
>    Traceback (most recent call last):
>      File "/usr/lib/python3/dist-packages/knack/cli.py", line 215, in invoke
>        cmd_result = self.invocation.execute(args)
>      File "/usr/lib/python3/dist-packages/azure/cli/core/commands/__init__.py", line 553, in execute
>        self.commands_loader.load_arguments(command)
>      File "/usr/lib/python3/dist-packages/azure/cli/core/__init__.py", line 345, in load_arguments
>        loader.load_arguments(command)  # this adds entries to the argument registries
>      File "/usr/lib/python3/dist-packages/azure/cli/command_modules/vm/__init__.py", line 31, in load_arguments
>        from azure.cli.command_modules.vm._params import load_arguments
>      File "/usr/lib/python3/dist-packages/azure/cli/command_modules/vm/_params.py", line 31, in <module>
>        from azure.cli.command_modules.monitor.actions import get_period_type
>      File "/usr/lib/python3/dist-packages/azure/cli/command_modules/monitor/actions.py", line 7, in <module>
>        import antlr4
>    ModuleNotFoundError: No module named 'antlr4'
> 
> The "az vm" commands are so fundamental, that this bug renders the 
> package unusable IMO.
> 
> As a quick&dirty work-around, I've moved the import to the function that 
> uses it; see the attachment.

Whether it's fundamental or not is pretty much subjective - I never use
it, for example. Anyway, there's a simple enough workaround as
mentioned - install antlr4 with pip until it gets packaged. Not ideal,
but it will do for now. I've asked upstream if they can downgrade to
antlr3 as well.

-- 
Kind regards,
Luca Boccassi
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