Libcst code generation

[justinchuby]

• [ ] Remove assignment and return the last expression

  @script()
  def aten_split(self, split_size):
      val_return_val = op.SplitToSequence(val_self, val_split_size, axis=0)
      return return_val

  should become

  @script()
  def aten_split(self, split_size):
      return op.SplitToSequence(val_self, val_split_size, axis=0)

• [ ] Transform if graphs into branches
• [ ] Normalize invalid node names
• [ ] Handle function domain names: Currently the domain name is appended onto the function name, but that is not a valid name
• [ ] Use value_ints etc. to replace make_tensor calls

  val_414 = op.Constant(
      value=onnx.helper.make_tensor(
          name="value", data_type=onnx.TensorProto.INT64, dims=[2], vals=[-1, 8]
      )
  )

[BowenBao]

Let's consider this too https://github.com/microsoft/onnxscript/issues/806. And should we inline small tensors, like the one in your example for Use value_ints etc. to replace make_tensor calls?

[gramalingam]

• Remove assignment and return the last expression

Since this is fairly generic, I wonder if we can just use some standard python tools as a post-processing cleanup (rather than implement it ourselves)?