parsing a nested json file

[Dader Grund]

hallo,

i have a  nested json file like :
{
        "fw1": {
                "ipv4": {
                        "rtr": {
                                "ip": "1.2.3.4",
                                "net": "1.2.3.4",
                            
                        }
                }
        },
        "fw2": {
                "ipv4": {
                        "rtr": {
                                "ip": "4.3.2.1",
                                "net": "4.3.2.1",
                               
                        }
                }
        }
}


How could i parse in this case only the "ip" value of "fw2" ?
for a non nested json dictionary this phrase has worked for me

{{ (lookup('file', '/etc/foo.txt') | from_json).get('ip') }}.

[Kai Stian Olstad]

from_json)['fw2']['ipv4']['rtr']['ip'] }}

or

{{ (lookup('file', '/etc/foo.txt') | from_json).fw2.ipv4.rtr.ip }}

--
Kai Stian Olstad

[Dader Grund]

Thanks alot dude. It did work ^^
i have recently got it working using lookup('file', '/etc/foo.txt') | from_json).get('fw2').get('ipv4').get('rtr').get('ip')     # haha though  it didn't look quit  pretty
i noticed if i am using an attribute with a minus sign i.e "fw2-m" the dot notation wouldn't work.
Just curious how could one overcome this issue?

[Kai Stian Olstad]

Python identifiers is not allowed to have dash in them(because dash is a
subtraction), so only way around it in Ansible, is to use the square
brackets notation.

--
Kai Stian Olstad

[Dader Grund]

can u please tell me why should one add a single parentheses to "from_json).foo" ?