pathwaycom/pathway · error · ValueError

Unknown mode: {}. Only {} are supported

Error message

Unknown mode: {}. Only {} are supported

What it means

Error "Unknown mode: {}. Only {} are supported" thrown in pathwaycom/pathway.

Source

Thrown at python/pathway/io/_utils.py:177

                stacklevel=stacklevel + 1,
            )
            kwargs.pop(kwarg_name)
    deprecated_kwargs_with_custom_report = ["persistent_id"]
    unexpected_args_list = []
    for kwarg in kwargs.keys():
        if kwarg not in deprecated_kwargs_with_custom_report:
            unexpected_args_list.append(kwarg)
    if unexpected_args_list:
        unexpected_arg_names = ", ".join(repr(arg) for arg in unexpected_args_list)
        raise TypeError(f"Got unexpected keyword arguments: {unexpected_arg_names}")


def internal_connector_mode(mode: str | api.ConnectorMode) -> api.ConnectorMode:
    if isinstance(mode, api.ConnectorMode):
        return mode
    internal_mode = _INPUT_MODES_MAPPING.get(mode)
    if not internal_mode:
        raise ValueError(
            "Unknown mode: {}. Only {} are supported".format(
                mode, ", ".join(_INPUT_MODES_MAPPING.keys())
            )
        )

    return internal_mode


def internal_read_method(format: str) -> ReadMethod:
    if format in (
        "binary",
        "plaintext_by_file",
        "plaintext_by_object",
        "only_metadata",
    ):
        return ReadMethod.FULL
    return ReadMethod.BY_LINE

View on GitHub (pinned to fa2f74a464)

Solutions

1. Pass one of the supported modes listed in the error message.

Example fix

pw.io.fs.read(path, mode='streaming')

When it happens

Trigger: Thrown at python/pathway/io/_utils.py:177 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of pathwaycom/pathway@fa2f74a464 (2026-08-15). Data as JSON: /api/errors/2dd4f05056906023. Report an issue: GitHub.