OpenBB-finance/OpenBB · warning · EmptyDataError

No data found

Error message

No data found

What it means

transform_data raises EmptyDataError when the fetcher hands it an empty list — i.e. the Deribit API was reached but returned zero instruments for the underlying. OpenBB uses EmptyDataError as a well-known signal that the request succeeded but no rows exist, so the framework (and callers) can distinguish 'no data' from 'error'. For a BTC/ETH/PAXG curve this usually means the upstream snapshot fetch returned nothing.

Source

Thrown at openbb_platform/providers/deribit/openbb_deribit/models/futures_curve.py:156

                    if hours_data:
                        data.extend(hours_data)
            return data
        except Exception as e:  # pylint: disable=broad-except
            raise OpenBBError(
                f"Failed to get futures curve -> {e.__class__.__name__ if hasattr(e, '__class__') else e}: {e.args}"
            ) from e

    @staticmethod
    def transform_data(
        query: DeribitFuturesCurveQueryParams, data: list, **kwargs: Any
    ) -> list[DeribitFuturesCurveData]:
        """Transform the data."""
        # pylint: disable=import-outside-toplevel
        from datetime import datetime  # noqa
        from pandas import to_datetime

        if not data:
            raise EmptyDataError("No data found")

        futures_curve: list[DeribitFuturesCurveData] = []

        for d in data:
            if not d:
                continue

            ins_name = d.get("instrument_name", "")
            exp = ins_name.split("-")[1]
            hours_ago = d.get("hours_ago", 0)
            exp = (
                datetime.today().strftime("%Y-%m-%d")
                if exp == "PERPETUAL"
                else to_datetime(exp).strftime("%Y-%m-%d")
            )

            price = d.get("last_price", d.get("mark_price"))

View on GitHub (pinned to 3e071fcc2c)

Solutions

1. Retry once — transient empty responses from Deribit usually resolve immediately
2. Try BTC or ETH to confirm the endpoint works, then re-try the original symbol
3. Handle EmptyDataError explicitly in callers as 'no rows' rather than propagating an error

Example fix

# before
res = obb.derivatives.futures.curve(symbol='PAXG', provider='deribit')

# after
from openbb_core.provider.abstract.fetcher import EmptyDataError
try:
    res = obb.derivatives.futures.curve(symbol='PAXG', provider='deribit')
except EmptyDataError:
    res = []  # no futures currently listed for this underlying

from openbb_core.provider.abstract.fetcher import EmptyDataError

try:
    curve = obb.derivatives.futures.curve(symbol=sym, provider='deribit').to_df()
except EmptyDataError:
    curve = pd.DataFrame()  # no futures listed for this underlying right now

When it happens

Trigger: Symbol with no currently listed futures (possible for PAXG during low listing periods); upstream helper returned an empty instrument list due to a filtered/malformed response; hours_ago snapshot cache empty so comparison fetch yields nothing.

Common situations: Querying PAXG when Deribit has no listed dated futures; transient Deribit response anomalies; running immediately after market maintenance windows.

Related errors

• [Empty] -> {e}
• No data found.
• No data found for the given symbol and dates.
• No data found in the response. URL: {url}
• No data rows found for dataflow '{dataflow}' with parameters

AI-assisted analysis of OpenBB-finance/OpenBB@3e071fcc2c (2026-08-14). Data as JSON: /api/errors/dee21d95a213f0ef. Report an issue: GitHub.