code: def cast_tuple(val, num):
      return val if isinstance(val, tuple) else (val,) * num
  
imports: from math import sqrt
  import torch
  from torch import nn, einsum
  import torch.nn.functional
  from einops import rearrange, repeat
  from einops.layers.torch import Rearrange
label_desc: Use image node_id 1 for calling a global function with example usage: cast_tuple(val, num) and returns: unknown