Method apply

returns/io.py:102–128

Calls a wrapped function in a container on this container. .. code:: python >>> from returns.io import IO >>> assert IO('a').apply(IO(lambda inner: inner + 'b')) == IO('ab') Or more complex example that shows how we can work with regular functi

(
        self,
        container: Kind1['IO', Callable[[_ValueType_co], _NewValueType]],
    )

        return IO(function(self._inner_value))

    def apply(
        self,
        container: Kind1['IO', Callable[[_ValueType_co], _NewValueType]],
    ) -> 'IO[_NewValueType]':
        """
        Calls a wrapped function in a container on this container.

        .. code:: python

          >>> from returns.io import IO
          >>> assert IO('a').apply(IO(lambda inner: inner + 'b')) == IO('ab')

        Or more complex example that shows how we can work
        with regular functions and multiple ``IO`` arguments:

        .. code:: python

          >>> from returns.curry import curry

          >>> @curry
          ... def appliable(first: str, second: str) -> str:
          ...      return first + second

          >>> assert IO('b').apply(IO('a').apply(IO(appliable))) == IO('ab')

        """
        return self.map(dekind(container)._inner_value)  # noqa: SLF001

    def bind(
        self,