'Sends a single datapoint metric to DataDog
:param metric_name: The name of the metric
:type metric_name: string
:param datapoint: A single integer or float related to the metric
:type datapoint: integer or float
:param tags: A list of tags associated with the metric
:type tags: list'

def send_metric(self, metric_name, datapoint, tags=None):

    response = api.Metric.send(metric=metric_name, points=datapoint, host=self.host, tags=tags)
    self.validate_response(response)
    return response
