human
I wrote the below code

    T = current.T
    db = current.db
    s3db = current.s3db
    s3 = current.response.s3
    settings = current.deployment_settings
    def prep(r):
        s3db.gis_location_filter(r)
        if (r.representation == 'json'):
            r.table.pe_id.readable = True
            list_fields = (s3db.get_config(r.tablename, 'list_fields') or [])
            s3db.configure(r.tablename, list_fields=(list_fields + ['pe_id']))
        elif ((r.representation == 'xls') and (r.component_name == 'branch')):
            table = s3db.org_organisation_branch
            table.organisation_id.represent = org_OrganisationRepresent(acronym=False)
            table.branch_id.represent = org_OrganisationRepresent(parent=False)
            s3db.configure('org_organisation_branch', list_fields=['organisation_id', 'branch_id'])
        elif (r.interactive or (r.representation == 'aadata')):
            component = r.component
            gis = current.gis
            otable = r.table
            otable.country.default = gis.get_default_country('code')
            type_filter = r.get_vars.get('organisation_type.name', None)
            method = r.method
            use_branches = settings.get_org_branches()
            if (use_branches and (not component) and (not r.record) and (r.method != 'deduplicate') and ((not type_filter) or (type_filter != 'Training    Center'))):
                branch_filter = (FS('parent.id') == None)
                lfilter = current.session.s3.location_filter
                if lfilter:
                    gtable = s3db.gis_location
                    query = (gtable.id == lfilter)
                    row = db(query).select(gtable.id, gtable.name, gtable.level, gtable.path, limitby=(0, 1)).first()
                    if (row and row.level):
                        if (row.level != 'L0'):
                            code = gis.get_parent_country(row, key_type='code')
                        else:
                            ttable = s3db.gis_location_tag
                            query =...

What's a good function header?

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

def org_organisation_controller():