Empty JSON Output for prompt using LLM #893

SumanthMeenan · 2025-01-15T16:11:39Z

I want to extract all providers listed in this url https://www.aetna.com/dsepublic/#/contentPage?page=providerResults&parameters=searchText%3D'Primary%20Care%20Physician%20(PCP)';isGuidedSearch%3Dtrue&site_id=asa&language=en

I can use selenium, Bsoup etc., but came across this tool
I'm getting empty array as output
Found providers ['openai', 'azure_openai'] for model gpt-3.5-turbo-0125, using openai.
If it was not intended please specify the model provider in the graph configuration
--- Executing Fetch Node ---
--- (Fetching HTML from: https://www.aetna.com/dsepublic/#/contentPage?page=providerResults&parameters=searchText%3D'Primary%20Care%20Physician%20(PCP)';isGuidedSearch%3Dtrue&site_id=asa&language=en) ---
--- Executing ParseNode Node ---
Error occurred: not enough values to unpack (expected 2, got 0)

dosubot · 2025-01-15T16:13:51Z

Hello @SumanthMeenan! I'm here to help you with any bugs, questions, or contributions you may have. Let's work together to solve this issue.

The error "not enough values to unpack (expected 2, got 0)" typically occurs when the code is trying to unpack a sequence (like a tuple or list) into variables, but the sequence doesn't contain enough elements. In the context of Scrapegraph-ai, this might happen during the parsing stage if the expected data structure isn't being returned from the Fetch Node.

Here are a few steps you can take to troubleshoot and resolve this issue:

Check the Fetch Node Output: Ensure that the Fetch Node is correctly retrieving the HTML content. Since the URL involves dynamic content, make sure that the Fetch Node is configured to handle JavaScript-rendered content, possibly using a headless browser like ChromiumLoader.
Verify the ParseNode Configuration: Ensure that the ParseNode is correctly configured to handle the structure of the HTML content. If the HTML structure doesn't match the expected format, it could lead to unpacking errors.
Model Provider Configuration: The message suggests specifying the model provider in the graph configuration. Ensure that the correct model provider is set in your configuration to avoid any issues related to model selection.
Debugging: Add logging or print statements to check the intermediate outputs between nodes. This can help identify where the data structure might not be as expected.

If these steps don't resolve the issue, you might need to inspect the specific implementation details of the Fetch and Parse nodes to ensure they align with the webpage's content structure.

To continue talking to Dosu, mention @dosu.

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VinciGit00 · 2025-01-15T16:59:49Z

can you fetch by yourself the code?

clemlesne · 2025-01-17T12:18:53Z

This issue often happens, I would say 50% of the time. I'm using SearchGraph with 20 results, from SearXNG. The whole pipeline crashes, which is totally unpractical.

A simple condition would exclude the doc. Or, implement a retry mechanism for empty page_content.

Kilowhisky · 2025-01-18T22:44:16Z

This happens often and random for me as well. This should be a recoverable error.

VinciGit00 · 2025-01-18T22:50:34Z

which model are you using?

Kilowhisky · 2025-01-18T23:06:31Z

Here's the output of the error:

I'm on GPT 4o-mini with duckduckgo and scrape_do (but i've also seen it on local chrome)
i've also seen it with other combos as well

"errorMessage": "Traceback (most recent call last):
  File \"/var/task/index.py\", line 128, in scrape
    result = smart_scraper_graph.run()
             ^^^^^^^^^^^^^^^^^^^^^^^^^
  File \"/usr/local/lib/python3.12/dist-packages/scrapegraphai/graphs/search_graph.py\", line 110, in run
    self.final_state, self.execution_info = self.graph.execute(inputs)
                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File \"/usr/local/lib/python3.12/dist-packages/scrapegraphai/graphs/base_graph.py\", line 358, in execute
    return self._execute_standard(initial_state)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File \"/usr/local/lib/python3.12/dist-packages/scrapegraphai/graphs/base_graph.py\", line 303, in _execute_standard
    raise e
  File \"/usr/local/lib/python3.12/dist-packages/scrapegraphai/graphs/base_graph.py\", line 276, in _execute_standard
    result, node_exec_time, cb_data = self._execute_node(
                                      ^^^^^^^^^^^^^^^^^^^
  File \"/usr/local/lib/python3.12/dist-packages/scrapegraphai/graphs/base_graph.py\", line 200, in _execute_node
    result = current_node.execute(state)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File \"/usr/local/lib/python3.12/dist-packages/scrapegraphai/nodes/graph_iterator_node.py\", line 77, in execute
    state = asyncio.run(self._async_execute(state, batchsize))
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File \"/usr/lib/python3.12/asyncio/runners.py\", line 194, in run
    return runner.run(main)
           ^^^^^^^^^^^^^^^^
  File \"/usr/lib/python3.12/asyncio/runners.py\", line 118, in run
    return self._loop.run_until_complete(task)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File \"/usr/lib/python3.12/asyncio/base_events.py\", line 687, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File \"/usr/local/lib/python3.12/dist-packages/scrapegraphai/nodes/graph_iterator_node.py\", line 141, in _async_execute
    answers = await tqdm.gather(
              ^^^^^^^^^^^^^^^^^^
  File \"/usr/local/lib/python3.12/dist-packages/tqdm/asyncio.py\", line 79, in gather
    res = [await f for f in cls.as_completed(ifs, loop=loop, timeout=timeout,
           ^^^^^^^
  File \"/usr/lib/python3.12/asyncio/tasks.py\", line 631, in _wait_for_one
    return f.result()  # May raise f.exception().
           ^^^^^^^^^^
  File \"/usr/local/lib/python3.12/dist-packages/tqdm/asyncio.py\", line 76, in wrap_awaitable
    return i, await f
              ^^^^^^^
  File \"/usr/local/lib/python3.12/dist-packages/scrapegraphai/nodes/graph_iterator_node.py\", line 131, in _async_run
    return await asyncio.to_thread(graph.run)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File \"/usr/lib/python3.12/asyncio/threads.py\", line 25, in to_thread
    return await loop.run_in_executor(None, func_call)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File \"/usr/lib/python3.12/concurrent/futures/thread.py\", line 58, in run
    result = self.fn(*self.args, **self.kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File \"/usr/local/lib/python3.12/dist-packages/scrapegraphai/graphs/smart_scraper_graph.py\", line 292, in run
    self.final_state, self.execution_info = self.graph.execute(inputs)
                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File \"/usr/local/lib/python3.12/dist-packages/scrapegraphai/graphs/base_graph.py\", line 358, in execute
    return self._execute_standard(initial_state)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File \"/usr/local/lib/python3.12/dist-packages/scrapegraphai/graphs/base_graph.py\", line 303, in _execute_standard
    raise e
  File \"/usr/local/lib/python3.12/dist-packages/scrapegraphai/graphs/base_graph.py\", line 276, in _execute_standard
    result, node_exec_time, cb_data = self._execute_node(
                                      ^^^^^^^^^^^^^^^^^^^
  File \"/usr/local/lib/python3.12/dist-packages/scrapegraphai/graphs/base_graph.py\", line 200, in _execute_node
    result = current_node.execute(state)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File \"/usr/local/lib/python3.12/dist-packages/scrapegraphai/nodes/parse_node.py\", line 96, in execute
    chunks = split_text_into_chunks(
             ^^^^^^^^^^^^^^^^^^^^^^^
  File \"/usr/local/lib/python3.12/dist-packages/scrapegraphai/utils/split_text_into_chunks.py\", line 30, in split_text_into_chunks
    chunks = chunk(
             ^^^^^^
  File \"/usr/local/lib/python3.12/dist-packages/semchunk/semchunk.py\", line 186, in chunk
    chunks, offsets = zip(*[(chunk, offset) for chunk, offset in zip(chunks, offsets) if chunk and not chunk.isspace()]) if chunks else ([], []) # NOTE `if chunks else ([], [])` ensures that we don't unpack an empty list if there's no chunks (i.e., if the provided text was empty).
    ^^^^^^^^^^^^^^^
ValueError: not enough values to unpack (expected 2, got 0)
"

Jdh235 · 2025-01-25T01:08:15Z

I am using SearchGraph and coming across the same error when using 'gpt-4o-mini'. I do not get the error when using 'gpt-4o', however, gpt-4o is far too expensive for most people.

…raise `ValueError: not enough values to unpack (expected 2, got 0)` ([ScrapeGraphAI/Scrapegraph-ai#893](ScrapeGraphAI/Scrapegraph-ai#893))

umarbutler · 2025-02-13T23:01:29Z

Hey everyone, sincerest apologies about this, I've just fixed this in v3.0.4 of semchunk (please run pip install semchunk --upgrade to benefit from the new version, plus there's some minor performance enhancements you'll benefit from v3.0.3) and I've ensured there is now a unit test for this edge case.

The problem was that I was filtering out empty chunks including chunks consisting entirely of whitespace and then trying to unpack those filtered chunks which doesn't work if there's nothing to unpack.

PS If you ever do get any other issues with semchunk or other libraries, it is often better to raise those issues on the source library to make their creators aware. Thank you @Jdh235 for doing exactly that!

dschuld · 2025-02-15T22:15:32Z

I had the same error as mentioned. After the upgrade, the error does not appear anymore, but instead the returned content is hallucinated and has nothing to do with the web page I am trying to scrape.

umarbutler · 2025-02-16T00:30:03Z

I had the same error as mentioned. After the upgrade, the error does not appear anymore, but instead the returned content is hallucinated and has nothing to do with the web page I am trying to scrape.

This sounds like a Searchgraph bug. Presumably if no input is being provided to semchunk then you’re going to get no output and if you get no output then I guess it makes sense the model might start to hallucinate.

VinciGit00 · 2025-02-16T09:08:27Z

@umarbutler what do you suggests as solution?

umarbutler · 2025-02-16T10:45:34Z

@umarbutler what do you suggests as solution?

To be honest, I'm not familiar with scrape graph myself, so I can't help out here.

This is a better question for the devs. @DPende @LorenzoPaleari

dosubot bot added the bug Something isn't working label Jan 15, 2025

Jdh235 mentioned this issue Feb 13, 2025

Fixed error when chunks=['\n\n'] in chunk method isaacus-dev/semchunk#15

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Empty JSON Output for prompt using LLM #893

Empty JSON Output for prompt using LLM #893

SumanthMeenan commented Jan 15, 2025

dosubot bot commented Jan 15, 2025

VinciGit00 commented Jan 15, 2025

clemlesne commented Jan 17, 2025

Kilowhisky commented Jan 18, 2025 •

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umarbutler commented Feb 13, 2025 •

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dschuld commented Feb 15, 2025

umarbutler commented Feb 16, 2025

VinciGit00 commented Feb 16, 2025

umarbutler commented Feb 16, 2025

Empty JSON Output for prompt using LLM #893

Empty JSON Output for prompt using LLM #893

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SumanthMeenan commented Jan 15, 2025

dosubot bot commented Jan 15, 2025

VinciGit00 commented Jan 15, 2025

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