Method bind

returns/future.py:224–248

Applies 'function' to the result of a previous calculation. 'function' should accept a single "normal" (non-container) argument and return ``Future`` type object. .. code:: python >>> import anyio >>> from returns.future import Future

(
        self,
        function: Callable[[_ValueType_co], Kind1['Future', _NewValueType]],
    )

        return Future(_future.async_apply(dekind(container), self._inner_value))

    def bind(
        self,
        function: Callable[[_ValueType_co], Kind1['Future', _NewValueType]],
    ) -> 'Future[_NewValueType]':
        """
        Applies 'function' to the result of a previous calculation.

        'function' should accept a single "normal" (non-container) argument
        and return ``Future`` type object.

        .. code:: python

          >>> import anyio
          >>> from returns.future import Future
          >>> from returns.io import IO

          >>> def bindable(x: int) -> Future[int]:
          ...    return Future.from_value(x + 1)

          >>> assert anyio.run(
          ...     Future.from_value(1).bind(bindable).awaitable,
          ... ) == IO(2)

        """
        return Future(_future.async_bind(function, self._inner_value))

    #: Alias for `bind` method. Part of the `FutureBasedN` interface.
    bind_future = bind