def GetHistoricalData()

in get-historical-metrics.py [0:0]
34 lines of code
12 McCabe index (conditional complexity)

def GetHistoricalData():
    global Logger,LastRealtimeRun,Data,DataSources,MetricUnitMapping,Data

    Connect = boto3.client("connect")
    
    #
    # Build a list of information we need from the API.
    #
    ConnectList = {}
    for Item in DataSources:
        if Item not in Data: Data[Item] = "0"

        (ConnectARN,QueueARN,Metric) = DataSources[Item].split(":")

        if ConnectARN not in ConnectList: ConnectList[ConnectARN] = {}
        if QueueARN not in ConnectList[ConnectARN]: ConnectList[ConnectARN][QueueARN] = []
        ConnectList[ConnectARN][QueueARN].append({"Name":Metric,"Unit":MetricUnitMapping[Metric][0],"Statistic":MetricUnitMapping[Metric][1]})

    FiveMinuteMark = datetime.datetime.now().minute-datetime.datetime.now().minute%5
    
    #
    # Now call the API for each Connect instance we're interested in.
    #
    for Instance in ConnectList:
        Logger.debug("Retrieving historical data from "+Instance)
        
        MetricList = []
        for Queue in ConnectList[Instance]:
            MetricList += ConnectList[Instance][Queue]
            
        try:
            Response = Connect.get_metric_data(
                           InstanceId=Instance,
                           StartTime=datetime.datetime.now().replace(hour=0, minute=0, second=0),
                           EndTime=datetime.datetime.now().replace(minute=FiveMinuteMark, second=0),
                           Groupings=["QUEUE"],
                           Filters={"Queues":list(ConnectList[Instance].keys())},
                           HistoricalMetrics=MetricList)
        except Exception as e:
            Logger.error("Failed to get historical data: "+str(e))
            continue

        if "MetricResults" not in Response: continue
        for Collection in Response["MetricResults"]:
            QueueARN   = Collection["Dimensions"]["Queue"]["Id"]

            for Metric in Collection["Collections"]:
                MetricName  = Metric["Metric"]["Name"]
                MetricValue = Metric["Value"]
                StoreMetric(Instance, QueueARN, MetricName, MetricValue)