NoDataError
The NoDataError exception is used to indicate that required data for a policy check is missing. This exception is automatically caught by the Check context manager, which sets the check status to "no-data".
The purpose of NoDataError is to distinguish between:
Missing Data: When required data is not present (results in "no-data" status)
Failed Assertions: When data is present but doesn't meet the policy requirements (results in "fail" status)
This distinction is important because Lunar re-evaluates policies as data becomes available. A "no-data" status indicates that the policy should be re-evaluated when more data is collected, while a "fail" status indicates a definitive policy violation.
Constructor
NoDataError(message=None)message (str, optional): A message describing why the data is missing
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