code: def diff(self, **kwargs):
      self.snapshot_controller = SnapshotController()
      snapshot_id_1 = kwargs.get("id_1", None)
      snapshot_id_2 = kwargs.get("id_2", None)
      snapshot_obj_1 = self.snapshot_controller.get(snapshot_id_1)
      snapshot_obj_2 = self.snapshot_controller.get(snapshot_id_2)
      comparison_attributes = [
          "id",
          "created_at",
          "message",
          "label",
          "code_id",
          "environment_id",
          "file_collection_id",
          "config",
          "stats",
      ]
      table_data = [
          ["Attributes", "Snapshot 1", "", "Snapshot 2"],
          ["", "", "", ""],
      ]
      for attribute in comparison_attributes:
          value_1 = (
              getattr(snapshot_obj_1, attribute)
              if getattr(snapshot_obj_1, attribute)
              else "N/A"
          )
          value_2 = (
              getattr(snapshot_obj_2, attribute)
              if getattr(snapshot_obj_2, attribute)
              else "N/A"
          )
          if isinstance(value_1, datetime):
              value_1 = prettify_datetime(value_1)
          if isinstance(value_2, datetime):
              value_2 = prettify_datetime(value_2)
          if attribute in ["config", "stats"]:
              alldict = []
              if isinstance(value_1, dict):
                  alldict.append(value_1)
              if isinstance(value_2, dict):
                  alldict.append(value_2)
              allkey = set().union(*alldict)
              for key in allkey:
                  key_value_1 = (
                      "%s: %s" % (key, value_1[key])
                      if value_1 != "N/A" and value_1.get(key, None)
                      else "N/A"
                  )
                  key_value_2 = (
                      "%s: %s" % (key, value_2[key])
                      if value_2 != "N/A" and value_2.get(key, None)
                      else "N/A"
                  )
                  table_data.append(
                      [attribute, key_value_1, "->", key_value_2]
                  )
          else:
              table_data.append([attribute, value_1, "->", value_2])
      output = format_table(table_data)
      self.cli_helper.echo(output)
      return output
  
imports: from __future__ import print_function
  import os
  from datetime import datetime
  from datmo.core.util.i18n import get
  from datmo.cli.driver.helper import Helper
  from datmo.core.util.misc_functions import mutually_exclusive, printable_object, prettify_datetime, parse_cli_key_value, format_table
  from datmo.core.util.exceptions import SnapshotCreateFromTaskArgs
  from datmo.cli.command.project import ProjectCommand
  from datmo.core.controller.snapshot import SnapshotController
label_desc: Use image node_id 9 for calling the SnapshotCommand obj's underlying member method code with example usage: obj.diff() and returns: output