code: def nonzero(input, *, out=None, as_tuple=False):
      ret = ivy.nonzero(input)
      if as_tuple is False:
          ret = ivy.matrix_transpose(ivy.stack(ret))
  
      if ivy.exists(out):
          return ivy.inplace_update(out, ret)
      return ret
  
imports: import ivy
  from ivy.func_wrapper import with_unsupported_dtypes
  from ivy.functional.frontends.torch.func_wrapper import to_ivy_arrays_and_back, numpy_to_torch_style_args, to_ivy_shape
  import ivy.functional.frontends.torch
label_desc: Use image node_id 22 for calling a global function with example usage: nonzero(input) and returns: ret, ivy