Unexpected value when parsing config

[mesmeridze]

I am trying to pare Arista EOS config, which is mostly Cisco like, however getting unexpected results:
#!/usr/bin/python3
import sys
import confparser

doc = '''

• match: interface (\S+)
  parent: interface
  child:
  • match: load-interval (\S+)
    name: load-interval
  • match: switchport (\S+)
    parent: switchport
    child:
    • match: trunk (\S+)
      parent: trunk
      child:
      • match: native (\S+)
  • match: mlag (\S+)
    name: mlag
    '''
    cfg = '''
    interface Port-Channel1
    load-interval 30
    switchport trunk native vlan 100
    switchport trunk allowed vlan 100,200,300-303,400,500
    switchport mode trunk
    mlag 1
    spanning-tree portfast
    !
    interface Port-Channel2
    description et-50/1 Core-1-port-0
    load-interval 30
    switchport trunk native vlan 100
    switchport trunk allowed vlan 100,200,300-303,400,500
    switchport mode trunk
    mlag 2
    spanning-tree portfast
    !
    interface Port-Channel3
    description et-0/0/52-to-Core-2-port-0
    load-interval 30
    switchport trunk native vlan 100
    switchport trunk allowed vlan 100,200,300-303,400,500
    switchport mode trunk
    mlag 3
    spanning-tree portfast
    !
    '''
    print(confparser.Dissector(doc).parse_str(cfg, indent=3))

What I see is this:
{
"interface": {
"Port-Channel1": {
"load-interval": "30",
"switchport": {
"trunk": {},
"mode": {}
},
"mlag": "1"
},
"Port-Channel2": {
"load-interval": "30",
"switchport": {
"trunk": {},
"mode": {}
},
"mlag": "2"
},
"Port-Channel3": {
"load-interval": "30",
"switchport": {
"trunk": {},
"mode": {}
},
"mlag": "3"
}
}
}
However I would expect that trunk block should became a key, "native" subkey and "vlan 100" as a value
{
"interface": {
"Port-Channel1": {
"load-interval": "30",
"switchport": {
"trunk": {
"native": "vlan 100"
},
"mode": "trunk"
},
"mlag": "1"
},
Sorry I am exhausted with ideas, maybe tried all what is possible ))

[tdorssers]

You can take a look at ios.yaml, which parses most of your Arista config.

- match: interface (\S+)
  parent: interface
  child:
  - match: switchport trunk allowed vlan (?!add)(\S+)
    name: allowed_vlan
    action: expand
  - match: switchport trunk allowed vlan add (\S+)
    name: allowed_vlan
    action: expand

will output:

{
    "interface": {
        "GigabitEthernet1/1/1": {
            "allowed_vlan": [
                "10",
                "11",
                "12",
                "15"
            ]
        }
    }
}