ansible-vault
This project aim to R/W an ansible-vault yaml file.
This is not Ansible official project.
You can install with pip.
$ pip install ansible-vault
When you have an ansible-vault file, then you can read file. See below.
from ansible_vault import Vault
vault = Vault('password')
data = vault.load(open('vault.yml').read())
When you have to write data, then you can write data to file. See below.
from ansible_vault import Vault
vault = Vault('password')
vault.dump(data, open('vault.yml', 'w'))
# also you can get encrypted text
print(vault.dump(data))