look_up for values with minus character

[TribuneX]

Hi,

how can I lookup values with have a minus character in their key field?

E.g.

list user {
    key "user-name";

    leaf user-name {
        type string;
    }
}

Something like value = instance_value.look_up(username=admin) does not work obviously.

Thanks!

[iwanb]

You can still pass invalid Python identifiers like this:

value = instance_value.look_up(**{'user_name': 'admin'})

[TribuneX]

Thanks. This works. However, the interface feels complex.
Why not provide a simpler version? Something like that:

value = instance_value.look_up(key='user-name', value='admin')

[metaswitch-colin-haywood]

Thanks. This works. However, the interface feels complex.
Why not provide a simpler version? Something like that:

value = instance_value.look_up(key='user-name', value='admin')

YANG lists can have multiple fields in their primary key, e.g.

list mylist {
  key "field1 field2";
...
}

As such the look_up function needs to take multiple key/value pairs at the same time, hence it taking a dict/kwargs. It's not specified in the docs, but I'd expect that it would indeed reject any dict that doesn't contain all the relevant key fields that the list in question has.

[llhotka]

Actually, as it is implemented, the keys argument needn't contain all keys, and they even needn't be keys as defined in YANG. The first entry found that matches the specified lookup keys is returned. I am not sure if it is good or bad, but at least a lookup is possible also for non-config lists that have no keys.