code: def diag(input, diagonal=0, *, out=None):
      return ivy.diag(input, k=diagonal)
  
imports: import ivy
  from ivy.func_wrapper import with_unsupported_dtypes, with_supported_dtypes
  from ivy.functional.frontends.torch.func_wrapper import to_ivy_arrays_and_back
  from ivy.functional.frontends.torch import promote_types_of_torch_inputs
  import ivy.functional.frontends.torch
label_desc: Use image node_id 16 for calling a global function with example usage: diag(input, diagonal) and returns: ivy