def __str__(self):
        return unicode(self.header)
Emits a value to output writer.
dataset/ETHPy150Open SheffieldML/GPy/GPy/util/netpbmfile.py/NetpbmFile.__str__--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/appengine-mapreduce/python/src/mapreduce/map_job_context.py/SliceContext.emit