in notebook/utils/wf.py [0:0]
def __init__(self, timeout=None, n_wait=None, client = None) :
self.timeout = timeout if timeout else SFNMonitor.TIMEOUT
self.n_wait = n_wait if n_wait else SFNMonitor.POLL_RATE
self.sfn = boto3.client("stepfunctions") if not client else client