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Decorator function that instantiates the Retrying object
@param *dargs: positional arguments passed to Retrying object
@param **dkw: keyword arguments passed to the Retrying object
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Sleep an incremental amount of time after each attempt, starting at
wait_incrementing_start and incrementing by wait_incrementing_increment
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An Attempt encapsulates a call to a target function that may end as a
normal return value from the function or an Exception depending on what
occurred during the execution.
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Return the return value of this Attempt instance or raise an Exception.
If wrap_exception is true, this Attempt is wrapped inside of a
RetryError before being raised.
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A RetryError encapsulates the last Attempt instance right before giving up.
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