code: def decrypt_f(input: DTensor, decryptor):
      return DTensor(
          input.shardings.map_shard(
              lambda x: _custom_ops.decrypt_f(x, decryptor),
              type="plain",
          )
      )
  
file_path: FATE/python/fate/arch/tensor/distributed/_ops_cipher.py
imports: from fate.arch.tensor import _custom_ops
  from ._tensor import DTensor, implements
label_desc: Use image node_id 4 for calling a global function with example usage: decrypt_f(input, decryptor) and returns: DTensor