Unable to use molecule

[Sudheer S]

Hello,

I am unable to get molecule to work.

Here's the output when I try to run:

molecule test
--> Validating schema 
/home/sudheer/workspace/sudheer-projects/ansible-role-ruby/molecule/default/molecule.yml.
Validation completed successfully.
--> Test matrix

└── default
     ├── destroy
     ├── syntax
     ├── create
     ├── prepare
     ├── converge
     ├── lint
     ├── side_effect
     ├── verify
     └── destroy

--> Scenario: 'default'
--> Action: 'destroy'

PLAY [Destroy] 
*****************************************************************

TASK [Destroy molecule instance(s)] 
********************************************
     fatal: [localhost]: FAILED! => {"msg": "An unhandled exception 
occurred while templating '{{ lookup('file', molecule_file) | 
molecule_from_yaml }}'. Error was a <class 
'ansible.errors.AnsibleError'>, original message: template error while 
templating string: no filter named 'molecule_from_yaml'. String: {{ 
lookup('file', molecule_file) | molecule_from_yaml }}"}

PLAY RECAP 
*********************************************************************
     localhost                  : ok=0    changed=0 unreachable=0    
failed=1

ERROR:
An error occurred during the test sequence action: 'destroy'. Cleaning up.
--> Scenario: 'default'
--> Action: 'destroy'

PLAY [Destroy] 
*****************************************************************

TASK [Destroy molecule instance(s)] 
********************************************
     fatal: [localhost]: FAILED! => {"msg": "An unhandled exception 
occurred while templating '{{ lookup('file', molecule_file) | 
molecule_from_yaml }}'. Error was a <class 
'ansible.errors.AnsibleError'>, original message: template error while 
templating string: no filter named 'molecule_from_yaml'. String: {{ 
lookup('file', molecule_file) | molecule_from_yaml }}"}

PLAY RECAP 
*********************************************************************
     localhost                  : ok=0    changed=0 unreachable=0    
failed=1

ERROR:

I have installed Docker and molecule packages. I am able to use Docker 
outside of molecule on the same host.

I have installed these pacakges.

python3-molecule.noarch 2.19-2.fc29                         @updates
python2-docker.noarch 3.5.0-1.fc29                        @fedora
docker.x86_64 2:1.13.1-62.git9cb56fd.fc29         @fedora

I have tried removing python2-docker and installing python3-docker. 
There's no change in result.

Am I missing something?

-

Sudheer