{"record":{"id":"f2fbc486c9977f87","repo":"OpenBB-finance/OpenBB","slug":"failed-to-get-ticker-data-e-e-args-0","errorCode":null,"errorMessage":"Failed to get ticker data -> {e}: {e.args[0]}","messagePattern":"Failed to get ticker data -> (.+?): (.+?)","errorType":"exception","errorClass":"OpenBBError","httpStatus":null,"severity":"error","filePath":"openbb_platform/providers/deribit/openbb_deribit/utils/helpers.py","lineNumber":212,"sourceCode":"    -------\n    dict\n        The ticker data.\n    \"\"\"\n    # pylint: disable=import-outside-toplevel\n    from openbb_core.provider.utils.helpers import amake_request\n\n    url = f\"{BASE_URL}/api/v2/public/ticker?instrument_name={symbol}\"\n\n    try:\n        response = await amake_request(url)\n        if response.get(\"error\"):  # type: ignore[union-attr]\n            raise OpenBBError(response.get(\"error\"))  # type: ignore[union-attr]\n        data = response.get(\"result\", {})  # type: ignore[union-attr]\n        stats = data.pop(\"stats\", {})\n        return {**data, **stats}\n\n    except Exception as e:  # pylint: disable=broad-except\n        raise OpenBBError(f\"Failed to get ticker data -> {e}: {e.args[0]}\") from e\n\n\nasync def get_perpetual_symbols() -> dict:\n    \"\"\"\n    Get perpetual symbols.\n\n    Returns\n    -------\n    dict\n        A dictionary of short symbols to full perpetual symbols.\n    \"\"\"\n    instruments = await get_instruments(\"all\", \"future\")\n    return {\n        d[\"instrument_name\"].split(\"-\")[0].replace(\"_\", \"\"): d[\"instrument_name\"]\n        for d in instruments\n        if d.get(\"settlement_period\") == \"perpetual\"\n    }\n","sourceCodeStart":194,"sourceCodeEnd":230,"githubUrl":"https://github.com/OpenBB-finance/OpenBB/blob/3e071fcc2cd9f891cac6040ae60296dba76dab46/openbb_platform/providers/deribit/openbb_deribit/utils/helpers.py#L194-L230","documentation":"Catch-all OpenBBError in get_ticker_data: any exception inside the try block — including the in-band error raise (276), network failures, and response parse errors — is re-raised as 'Failed to get ticker data -> {e}: {e.args[0]}'. Caution: the unconditional e.args[0] indexing raises IndexError ('tuple index out of range') when the caught exception has empty args, obscuring the original error.","triggerScenarios":"The in-band 'error' OpenBBError fires here and is double-wrapped; a network exception with no args (some timeout classes) makes e.args[0] itself fail; or response is not a dict, making .get fail with AttributeError.","commonSituations":"Any ticker failure surfaces through this single message, so diagnosing requires reading the middle segment. Empty-args exceptions (e.g. asyncio.TimeoutError()) replace the real cause with 'tuple index out of range' — a known sharp edge.","solutions":["Parse the '{e}' portion (between '->' and the last ':') to recover the original exception; the trailing segment is e.args[0].","If the trailing segment says 'tuple index out of range', the true failure was a timeout-style exception with no args — check network/timeout conditions.","Fix the underlying cause: invalid instrument name (code 11000), connectivity, or rate limiting.","In your own forks, guard with e.args[0] if e.args else str(e) to avoid masking."],"exampleFix":"# before (library code, helpers.py)\nexcept Exception as e:\n    raise OpenBBError(f\"Failed to get ticker data -> {e}: {e.args[0]}\") from e\n\n# after\nexcept Exception as e:\n    detail = e.args[0] if e.args else str(e)\n    raise OpenBBError(f\"Failed to get ticker data -> {e}: {detail}\") from e","handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"from openbb_core.provider.utils.errors import OpenBBError\ntry:\n    t = await get_ticker_data(symbol)\nexcept OpenBBError as e:\n    msg = str(e)\n    if msg.endswith(\"tuple index out of range\"):\n        # real cause was an exception with empty args (usually a timeout)\n        handle_timeout(symbol)\n    elif \"Failed to get ticker data\" in msg:\n        handle_api_error(msg, symbol)\n    else:\n        raise","preventionTips":["Expect double-wrapped messages: parse the segment after '->' to find the root cause.","'tuple index out of range' at the end means an empty-args exception — suspect timeouts/network.","Verify symbol and connectivity before calling to avoid hitting the wrapper at all."],"tags":["deribit","ticker","error-wrapping","network","diagnostics"],"backgroundTag":null,"analyzedSha":"3e071fcc2cd9f891cac6040ae60296dba76dab46","analyzedAt":"2026-08-14T23:40:48.960Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}