code: def __init__(self, n_heads):
      super().__init__()
      self.n_heads = n_heads
  
imports: import math
  import torch
  from torch import nn
  from torch.nn import functional
label_desc: Use image node_id 1 to create a new QKVAttention object from inherited base classes: nn with example: obj = QKVAttention(n_heads)