docstr: Fetch operand needs nothing to do.
docstr_tok: ["Fetch","operand","needs","nothing","to","do","."]
code: def execute(cls, ctx, op):
      """
      Fetch operand needs nothing to do.
      """
  
file_path: mars/mars/core/operand/fetch.py
imports: import enum
  from ...None import opcodes
  from ...serialization.serializables import FieldTypes, StringField, ListField, Int32Field, ReferenceField
  from .base import Operand
  from .core import TileableOperandMixin
label_desc: Use image node_id 3 for calling the FetchMixin obj's underlying member method code with example usage: obj.execute(cls, ctx, op) without return types