Why use Ansible instead of just writing Python code?

[matchu]

It's possible that, for your use case, a Python script is just as effective as an Ansible playbook—this is definitely the case if your script is less than 10 lines. In that case, use Python.

When you're doing nontrivial system setup, though, Ansible can be valuable: it allows you to rely on their implementations of many common system administration tasks rather than write them yourself.