human
I wrote the below code

    T = current.T
    settings.base.system_name = T('Resource    Management    System')
    settings.base.system_name_short = T('RMS')
    settings.base.prepopulate += ('RMSAmericas', 'RMSAmericas/Demo')
    settings.base.theme = 'RMSAmericas'
    settings.ui.default_cancel_button = True
    settings.security.policy = 8
    settings.security.map = True
    settings.auth.registration_requires_approval = True
    settings.auth.registration_requires_verification = True
    settings.auth.registration_requests_organisation = True
    settings.auth.registration_organisation_required = True
    settings.auth.registration_requests_site = True
    settings.auth.registration_link_user_to = {'staff': T('Staff'), 'volunteer': T('Volunteer')}
    settings.auth.registration_roles = {'site_id': ['reader']}
    settings.auth.person_realm_human_resource_site_then_org = True
    settings.auth.person_realm_member_org = True
    settings.auth.entity_role_manager = True
    def ifrc_realm_entity(table, row):
        '\n                                                Assign    a    Realm    Entity    to    records\n                                '
        tablename = table._tablename
        if (tablename in ('hrm_certificate', 'hrm_department', 'hrm_job_title', 'hrm_course', 'hrm_programme', 'vol_award')):
            return None
        db = current.db
        s3db = current.s3db
        EID = 'pe_id'
        SID = 'site_id'
        PID = 'person_id'
        realm_entity_fks = dict(pr_contact=[('org_organisation', EID), ('pr_person', EID)], pr_contact_emergency=EID, pr_physical_description=EID, pr_address=[('org_organisation', EID), ('pr_person', EID)], pr_image=EID, pr_identity=PID, pr_education=PID, pr_note=PID, hrm_human_resource=SID, hrm_training=PID, inv_recv=SID, inv_send=SID, inv_track_item='track_org_id', inv_adj_item='adj_id', req_req_item='req_id')
        default_fks = ('catalog_id', 'project_id', 'project_location_id')
        realm_entity = 0
        fk = realm_entity_fks.get(tablename, None)
        fks = ([fk] if...

What's a good function header?
assistant
#Here's a good function header.

def config(settings):