code: def diagonal(input, offset=0, dim1=0, dim2=1):
      return ivy.diagonal(input, offset=offset, axis1=dim1, axis2=dim2)
  
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 18 for calling a global function with example usage: diagonal(input, offset, dim1, dim2) and returns: ivy