class_docstr: Test Pipeline
class_docstr_tok: ["Test","Pipeline"]
code: def test_revision_latest(self):
      p = (
          Pipeline.input("a")
          .map("a", "b", ops.test_revision().revision("v1").latest())
          .map("b", ("c", "d", "e"), lambda x: x)
          .output("c", "d")
      )
      res = p(1).get()
      self.assertEqual(res, ["v1", (1,)])
  
imports: import unittest
  from towhee.operator.nop import NOPNodeOperator
  from towhee.operator import PyOperator
  from towhee.runtime.pipeline import Pipeline
  from towhee.runtime.data_queue import Empty
  from towhee.runtime import ops, register
  from towhee.runtime.runtime_pipeline import RuntimePipeline
label_desc: Use image node_id 25 for calling the TestPipeline obj's underlying member method code with example usage: obj.test_revision_latest() without return types