code: def cast_tuple(val, l=3):
      val = val if isinstance(val, tuple) else (val,)
      return (*val, *((val[-1],) * max(l - len(val), 0)))
  
imports: from math import ceil
  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 3 for calling a global function with example usage: cast_tuple(val, l) and returns: unknown,  unknown