---/home/bob/ansible-hosts-bob----- my inventory file
[all:vars]
ansible_connection=local
ansible_python_interpreter=/home/bob/VENV/ansible/bin/python
ansible_user=test
ansible_ssh_pass=test

[local]
localhost ansible_connection=local

[nxos_bob]
nxos1_bob ansible_host=nxos1.com
nxos2_bob ansible_host=nxos2.com

 --------------/home/bob/ansible_course/class3/exercises/group_vars/nxos_bob------- group_vars

provider_ssh:
  host: "{{ ansible_host }}"
  username: "{{ username }}"
  password: "{{ password }}"
  transport: cli

provider_nxapi:
  host: "{{ ansible_host }}"
  username: "{{ ansible_user }}"
  password: "{{ ansible_ssh_pass }}"
  transport: nxapi
  use_ssl: yes
  validate_certs: no
  port: 8443

vlans_common:
  - vlan_id: 301
    admin_state: up
    name: blue
  - vlan_id: 302
    admin_state: up
    name: red
  - vlan_id: 303
    admin_state: up
    name: green

vlans: "{{ vlans_common }} + {{ vlans_unique|default([]) }}"

 ------/home/bob/ansible_course/class3/exercises/host_vars/nxos1/vlans_bob.yml----- host_vars

 vlans_unique:
  - vlan_id: 304
    admin_state: up
    name: yellow


 -------/home/bob/ansible_course/class3/exercises/-----

- name: Exercise1
  hosts: nxos_bob
  tasks:
    - name: Configure NEXUS VLANs
      nxos_vlan:
        provider: "{{ provider_nxapi }}"
        vlan_id: "{{ item.vlan_id }}"
        name: "{{ item.name }}"
      with_items: "{{ vlans }}"