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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def init_autoreload(mode: int) -> None: """Load and initialize the IPython autoreload extension."""

        from IPython.extensions import autoreload

        ip = get_ipython()  # type: ignore # noqa: F821
        autoreload.load_ipython_extension(ip)
        ip.magics_manager.magics["line"]["autoreload"](str(mode))