code: def _new_chunks(self, inputs, kws=None, **kw):
      self.n_mappers = len(inputs)
      return super()._new_chunks(inputs, kws, **kw)
  
file_path: mars/mars/core/operand/shuffle.py
imports: from .None import ShuffleFetchType, FetchShuffle
  from ...None import opcodes
  from ...serialization.serializables import Int32Field, StringField, TupleField, FieldTypes
  from .base import Operand, VirtualOperand, OperandStage
label_desc: Use image node_id 1 for calling the ShuffleProxy obj's underlying member method code with example usage: obj._new_chunks(inputs, kws) and returns: super