def mapper(self, key, value):
        raise NotImplementedError
Removes a PValue from the runner's cache.
dataset/ETHPy150Open Yelp/mrjob/mrjob/job.py/MRJob.mapper--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/DataflowPythonSDK/google/cloud/dataflow/runners/direct_runner.py/DirectPipelineRunner.clear_pvalue