code: def amax(data, axis=None, mapper=None, blen=None, storage=None,
           create='array', **kwargs):
      
      return reduce_axis(data, axis=axis, reducer=np.amax,
                         block_reducer=np.maximum, mapper=mapper,
                         blen=blen, storage=storage, create=create, **kwargs)
docs: Compute the maximum value.