DYFIService.py 文件源码

def getEvents(magnitude=1.0,significance=0,product='dyfi',lastUpdate=2678000):
    """
    Return a list of earthquake event urls that meet the conditions set above.
    Inputs:

     * magnitude: Event magnitude (OR condition with significance)
     * significance: Event significance (integer score assembled from weighting magnitude, PAGER alert level, Max MMI, etc.)
     * lastUpdateDelta: Only retrieve events that have been updated in the past lastUpdate minutes.
     * product: Only retrieve events that have this product type associated with them.
    """
    fh = urllib2.urlopen(FEEDURL)
    data = fh.read()
    fh.close()
    jdict = json.loads(data)
    eventurls = []
    tnow = datetime.utcnow()
    for event in jdict['features']:
        eurl = event['properties']['detail']
        emag = event['properties']['mag']
        esig = event['properties']['sig']
        etypes = event['properties']['types'].split(',')[1:-1]
        eupdate = datetime.utcfromtimestamp(event['properties']['updated']/1000)
        hasproduct = product in etypes
        if not hasproduct:
            continue
        if eupdate < tnow - timedelta(seconds=60*lastUpdate):
            continue
        eventurls.append(eurl)
    return eventurls