class_docstr: not again...
class_docstr_tok: ["not","again","..."]
code: def rotate_half(self, x: torch.Tensor):
      x1, x2 = x[..., : x.shape[-1] // 2], x[..., x.shape[-1] // 2 :]
      return torch.cat((-x2, x1), dim=-1)
  
imports: import torch
  import math
  from typing import Tuple
  from einops import repeat
label_desc: Use image node_id 5 for calling the RotarySanityCheck obj's underlying member method code with example usage: obj.rotate_half(x) and returns: torch