code: def test_MIMO_pipeline():
      from speechbrain.utils.data_pipeline import (
          DataPipeline,
          takes,
          provides,
      )
  
      @takes("text", "other-text")
      @provides("reversed", "concat")
      def text_pipeline(text, other):
          return text[::-1], text + other
  
      @takes("reversed", "concat")
      @provides("reversed_twice", "double_concat")
      def second_pipeline(rev, concat):
          yield rev[::-1]
          yield concat + concat
  
      @provides("hello-world")
      def provider():
          yield "hello-world"
  
      @takes("hello-world", "reversed_twice")
      @provides("message")
      def messenger(hello, name):
          return f"{hello}, {name}"
  
      pipeline = DataPipeline(
          ["text", "other-text"],
          dynamic_items=[second_pipeline, text_pipeline],
          output_keys=["text", "reversed", "reversed_twice"],
      )
      result = pipeline({"text": "abc", "other-text": "def"})
      assert result["reversed"] == "cba"
      assert result["reversed_twice"] == "abc"
      result = pipeline.compute_specific(
          ["concat"], {"text": "abc", "other-text": "def"}
      )
      assert result["concat"] == "abcdef"
      result = pipeline.compute_specific(
          ["double_concat"], {"text": "abc", "other-text": "def"}
      )
      assert result["double_concat"] == "abcdefabcdef"
      assert "concat" not in result
  
      # Add messenger but not provider, so "hello-world" is unaccounted for:
      pipeline.add_dynamic_item(messenger)
      with pytest.raises(RuntimeError):
          pipeline.compute_specific(
              ["message"], {"text": "abc", "other-text": "def"}
          )
      # Now add provider, so that the unaccounted for hello-world key gets accounted for.
      pipeline.add_dynamic_item(provider)
      result = pipeline.compute_specific(
          ["message"], {"text": "abc", "other-text": "def"}
      )
      assert result["message"] == "hello-world, abc"
  
imports: import pytest
label_desc: Use image node_id 3 for calling a global function with example usage: test_MIMO_pipeline() and returns: text,  unknown, hello, str, name