How to use the azure-mgmt-cosmosdb.azure.mgmt.cosmosdb.models.metric.Metric function in azure-mgmt-cosmosdb

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# license information.
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# Code generated by Microsoft (R) AutoRest Code Generator.
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# regenerated.
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from .metric import Metric


class PartitionMetric(Metric):
    """The metric values for a single partition.

    Variables are only populated by the server, and will be ignored when
    sending a request.

    :ivar start_time: The start time for the metric (ISO-8601 format).
    :vartype start_time: datetime
    :ivar end_time: The end time for the metric (ISO-8601 format).
    :vartype end_time: datetime
    :ivar time_grain: The time grain to be used to summarize the metric
     values.
    :vartype time_grain: str
    :param unit: The unit of the metric. Possible values include: 'Count',
     'Bytes', 'Seconds', 'Percent', 'CountPerSecond', 'BytesPerSecond',
     'Milliseconds'
    :type unit: str or ~azure.mgmt.cosmosdb.models.UnitType

def __init__(self, **kwargs):
        super(Metric, self).__init__(**kwargs)
        self.start_time = None
        self.end_time = None
        self.time_grain = None
        self.unit = kwargs.get('unit', None)
        self.name = None
        self.metric_values = None