Method bind_io

returns/future.py:967–996

Binds a function returning ``IO[a]`` container. .. code:: python >>> import anyio >>> from returns.io import IO, IOSuccess, IOFailure >>> from returns.future import FutureResult >>> def bind(inner_value: int) -> IO[float]: ...

(
        self,
        function: Callable[[_ValueType_co], IO[_NewValueType]],
    )

        )

    def bind_io(
        self,
        function: Callable[[_ValueType_co], IO[_NewValueType]],
    ) -> 'FutureResult[_NewValueType, _ErrorType_co]':
        """
        Binds a function returning ``IO[a]`` container.

        .. code:: python

          >>> import anyio
          >>> from returns.io import IO, IOSuccess, IOFailure
          >>> from returns.future import FutureResult

          >>> def bind(inner_value: int) -> IO[float]:
          ...     return IO(inner_value + 0.5)

          >>> assert anyio.run(
          ...     FutureResult.from_value(1).bind_io(bind).awaitable,
          ... ) == IOSuccess(1.5)
          >>> assert anyio.run(
          ...     FutureResult.from_failure(1).bind_io(bind).awaitable,
          ... ) == IOFailure(1)

        """
        return FutureResult(
            _future_result.async_bind_io(
                function,
                self._inner_value,
            )
        )

    def bind_future(
        self,