function_do_one_thing.py

def invitation(user):
  # ...

# Bad
def invite_supervisor_lembaga(lists_supervisor_lembaga: List[SupervisorLembaga]):
    '''
    Filter supervisor lembaga yang aktif dan kirim undangan
    '''
    for supevisor_lembaga in lists_supervisor_lembaga:
        if supervisor_lembaga.active:
            invitation(supervisor_lembaga)
                 
# Good 
def get_active_supervisor_lembaga(lists_supervisor_lembaga: List[SupervisorLembaga]):
    '''
    Filter supervisor_lembaga yang aktif
    '''
    return [supervisor_lembaga for supervisor_lembaga in lists_supervisor_lembaga if supervisor_lembaga.active]


def invite_supervisor_lembaga(lists_supervisor_lembaga: List[SupervisorLembaga]) -> None:
    """Send an email to a given list of clients.
    """
    for supervisor_lembaga in lists_supervisor_lembaga:
        invitation(supervisor_lembaga)