# Buggy code
def get_existing(module, args):
    existing = {}
    netcfg = get_config(module)

    try:
        asn_regex = ".*router\sbgp\s(?P<existing_asn>\d+).*"
        match_asn = re.match(asn_regex, str(netcfg), re.DOTALL)
        existing_asn_group = match_asn.groupdict()
        existing_asn = existing_asn_group["existing_asn"]
    except AttributeError:
        existing_asn = ""

    if existing_asn:
        parents = ["router bgp {0}".format(existing_asn)]
        if module.params["vrf"] != "default":
            parents.append("vrf {0}".format(module.params["vrf"]))

        parents.append(
            "address-family {0} {1}".format(module.params["afi"], module.params["safi"])
        )
        config = netcfg.get_section(parents)

        if config:
            for arg in args:
                if arg not in ["asn", "afi", "safi", "vrf"]:
                    existing[arg] = get_value(arg, config, module)

            existing["asn"] = existing_asn
            existing["afi"] = module.params["afi"]
            existing["safi"] = module.params["safi"]
            existing["vrf"] = module.params["vrf"]
    else:
        WARNINGS.append(
            "The BGP process {0} didn't exist but the task just created it.".format(
                module.params["asn"]
            )
        )

    return existing


# Traceback (AttributeError)
ok: [s-srv1leaf2-2] => {
"purge_vnis": [
9999
]
}
An exception occurred during task execution. The full traceback is:
Traceback (most recent call last):
File "/tmp/ansible_yZvBEZ/ansible_module_nxos_vxlan_vtep_vni.py", line 589, in <module>
main()
File "/tmp/ansible_yZvBEZ/ansible_module_nxos_vxlan_vtep_vni.py", line 533, in main
existing, interface_exist = invoke('get_existing', module, args)
File "/tmp/ansible_yZvBEZ/ansible_module_nxos_vxlan_vtep_vni.py", line 316, in invoke
return func(*args, **kwargs)
File "/tmp/ansible_yZvBEZ/ansible_module_nxos_vxlan_vtep_vni.py", line 377, in get_existing
temp_config = netcfg.get_section(parents)
File "/tmp/ansible_yZvBEZ/ansible_module_nxos_vxlan_vtep_vni.py", line 192, in get_section
section = self.get_section_objects(path)
File "/tmp/ansible_yZvBEZ/ansible_module_nxos_vxlan_vtep_vni.py", line 203, in get_section_objects
return self.expand_section(obj)
File "/tmp/ansible_yZvBEZ/ansible_module_nxos_vxlan_vtep_vni.py", line 175, in expand_section
if child in S:
File "/tmp/ansible_yZvBEZ/ansible_modlib.zip/ansible/module_utils/netcfg.py", line 47, in __eq__
AttributeError: 'str' object has no attribute 'line'

failed: [s-srv1leaf2-2] (item=9999) => {
"failed": true,
"invocation": {
"module_name": "nxos_vxlan_vtep_vni"
},
"item": 9999,

# Fixed code
def get_existing(module, args):
    existing = {}
    netcfg = CustomNetworkConfig(indent=2, contents=get_config(module))

    try:
        asn_regex = ".*router\sbgp\s(?P<existing_asn>\d+).*"
        match_asn = re.match(asn_regex, str(netcfg), re.DOTALL)
        existing_asn_group = match_asn.groupdict()
        existing_asn = existing_asn_group["existing_asn"]
    except AttributeError:
        existing_asn = ""

    if existing_asn:
        parents = ["router bgp {0}".format(existing_asn)]
        if module.params["vrf"] != "default":
            parents.append("vrf {0}".format(module.params["vrf"]))

        parents.append(
            "address-family {0} {1}".format(module.params["afi"], module.params["safi"])
        )
        config = netcfg.get_section(parents)

        if config:
            for arg in args:
                if arg not in ["asn", "afi", "safi", "vrf"]:
                    existing[arg] = get_value(arg, config, module)

            existing["asn"] = existing_asn
            existing["afi"] = module.params["afi"]
            existing["safi"] = module.params["safi"]
            existing["vrf"] = module.params["vrf"]
    else:
        WARNINGS.append(
            "The BGP process {0} didn't exist but the task just created it.".format(
                module.params["asn"]
            )
        )

    return existing