narwhals.exceptions

Exception raised when column name isn't present.

Exception raised when the underlying computation could not be evaluated.

Exception when duplicate column names are encountered.

Exception raised when object can't be converted to expression.

Exception raised during invalid operations.

Exception raised when using multi-output expression in unsupported context.

Warning issued when a method or function is considered unstable in the stable api.

Exception raised when a plugin backend does not support the requested operation.

This includes missing extension hooks (e.g. read_csv, __narwhals_namespace__) and lazy-only plugins used with eager-only functions.

Exception raised when trying to perform operations on data structures with incompatible shapes.

Exception raised when trying to convert to a DType which is not supported by the given backend.