__init__.py 文件源码

def get_history(targets, start='-1h', end='now'):
    """Retrieve the time series data for one or more metrics.

    Args:
        targets (str|List[str]): Graphite path, or list of paths.
        start (Optional[str]): Start of date range. Defaults to one hour ago.
        end (Optional[str]): End of date range. Defaults to now.

    Returns:
        A list of metric values.
    """

    metrics = query(targets, start, end)

    try:
        metrics = json.loads(metrics)[0]['datapoints']
    except:
        return []

    # Convert unix timestamps to plot.ly's required date format
    for metric in metrics:
        timestamp = datetime.fromtimestamp(metric[1])
        metric[1] = timestamp.strftime('%Y-%m-%d %H:%M:%S')

    return metrics