Return True if apf is running otherwise return False

def _status_apf():
    '''
    Return True if apf is running otherwise return False
    '''
    status = 0
    table = iptc.Table(iptc.Table.FILTER)
    for chain in table.chains:
        if 'sanity' in chain.name.lower():
            status = 1
    return True if status else False