[acl_loader/main.py]: Use get to fetch key 'ports'.

[praveen-li]

With if condition, always get must be used otherwise code will never receive None.

Signed-off-by: Praveen Chaudhary pchaudhary@linkedin.com

- What I did
Use get instead of []. With if condition, always get must be used otherwise code will never receive None.

- How I did it
Use get instead of [].

- How to verify it

root@fec26aa9f1be:/praveen# sonic-cfggen -d --print-data | grep -A 10 -B 5 NO-NSW-PACL-TEST
{
    "ACL_TABLE": {
        "NO-NSW-PACL-TEST": {
            "policy_desc": "NO-NSW-PACL-TEST",
            "ports": [
                ""
            ],
            "type": "L3"
        }
    },

root@fec26aa9f1be:/praveen# show acl table
Name              Type    Binding    Description       Stage
----------------  ------  ---------  ----------------  -------
NO-NSW-PACL-TEST  L3                 NO-NSW-PACL-TEST  ingress

- Previous command output (if the output of a command-line utility has changed)

- New command output (if the output of a command-line utility has changed)

[praveen-li]

@lguohan @jleveque

I think We should merge this simple fix, we are comparing val["ports"] against the None, whereas val["ports"] never returns None.