code: def execute(cls, ctx, op):
      ctx[op.outputs[0].key] = create_array(op)(
          "linspace",
          op.start,
          op.stop,
          num=op.num,
          endpoint=op.endpoint,
          dtype=op.dtype,
      )
  
file_path: mars/mars/tensor/datasource/linspace.py
imports: import numpy
  from ...None import opcodes
  from ...core import ExecutableTuple
  from ...serialization.serializables import Int64Field, BoolField, AnyField
  from ...config import options
  from ..utils import decide_chunk_sizes
  from .core import TensorNoInput
  from ..array_utils import create_array
label_desc: Use image node_id 8 for calling the TensorLinspace obj's underlying member method code with example usage: obj.execute(cls, ctx, op) without return types