ansible_python_interpreter - target host python path, useful for systems with multiple Python interpreters or not located at /usr/bin/python.

You can change interpreter location using host variables.

freebsd_host    ansible_python_interpreter=/usr/local/bin/python

Or by playbook variables.

---
- name: main build
  hosts: freebsd_host
  vars:
    ansible_python_interpreter: "/usr/local/bin/python2"
  roles:
    - common