microsoft/qlib · error · ValueError

not support {type(file_or_data)}

Error message

not support {type(file_or_data)}

What it means

Error "not support {type(file_or_data)}" thrown in microsoft/qlib.

Source

Thrown at scripts/dump_bin.py:284

                    np.array(_df[field]).astype("<f").tofile(fp)
            else:
                # append; self._mode == self.ALL_MODE or not bin_path.exists()
                np.hstack([date_index, _df[field]]).astype("<f").tofile(str(bin_path.resolve()))

    def _dump_bin(self, file_or_data: [Path, pd.DataFrame], calendar_list: List[pd.Timestamp]):
        if not calendar_list:
            logger.warning("calendar_list is empty")
            return
        if isinstance(file_or_data, pd.DataFrame):
            if file_or_data.empty:
                return
            code = fname_to_code(str(file_or_data.iloc[0][self.symbol_field_name]).lower())
            df = file_or_data
        elif isinstance(file_or_data, Path):
            code = self.get_symbol_from_file(file_or_data)
            df = self._get_source_data(file_or_data)
        else:
            raise ValueError(f"not support {type(file_or_data)}")
        if df is None or df.empty:
            logger.warning(f"{code} data is None or empty")
            return

        # try to remove dup rows or it will cause exception when reindex.
        df = df.drop_duplicates(self.date_field_name)

        # features save dir
        features_dir = self._features_dir.joinpath(code_to_fname(code).lower())
        features_dir.mkdir(parents=True, exist_ok=True)
        self._data_to_bin(df, calendar_list, features_dir)

    @abc.abstractmethod
    def dump(self):
        raise NotImplementedError("dump not implemented!")

    def __call__(self, *args, **kwargs):
        self.dump()

View on GitHub (pinned to 79633dd950)

Solutions

1. Pass a supported type (file path or DataFrame) to the dump function.
2. Convert your input to a pd.DataFrame or a supported file path before calling.

When it happens

Trigger: This error is raised at scripts/dump_bin.py:284 when the guard condition fails: "not support {type(file_or_data)}". It triggers when the code path receives input or a state that violates the precondition checked at this point — e.g. an unimplemented abstract method being called, an unsupported argument type/value, or an invalid configuration. To avoid it, satisfy the documented precondition before this call: implement the required method in your subclass, or pass a supported value of the expected type as described by the message.

Common situations: See trigger scenarios.

AI-assisted analysis of microsoft/qlib@79633dd950 (2026-08-15). Data as JSON: /api/errors/e6ce8d602beecf46. Report an issue: GitHub.