code: def __init__(self):
      x, y, z = scalars("xyz")
      e = pt.sigmoid((x + y + z) ** 2)
      op = OpFromGraph([x, y, z], [e])
      e2 = op(x, y, z)
  
      self.inputs = [x, y, z]
      self.outputs = [e2]
  
file_path: pytensor/tests/d3viz/models.py
imports: import numpy
  import pytensor.tensor
  from pytensor import shared
  from pytensor.compile.builders import OpFromGraph
  from pytensor.tensor.special import softmax
  from pytensor.tensor.type import dmatrix, scalars
label_desc: Use image node_id 1 to create a new OfgSimple object  with example: obj = OfgSimple()