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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 register_method(func, name=None, deprecated=False):
 """Register a method of calculating an average spectrogram. Parameters func : `callable` function to execute name : `str`, optional name of the method, defaults to ``func.__name__`` deprecated : `bool`, optional whether this method is deprecated (`True`) or not (`False`) Returns ------- name : `str` the registered name of the function, which may differ pedantically from what was given by the user. """

    # warn about deprecated functions
    if deprecated:
        func = deprecated_function(
            func,
            "the {0!r} PSD methods is deprecated, and will be removed "
            "in a future release, please consider using {1!r} instead".format(
                name, name.split('-', 1)[1],
            ),
        )

    if name is None:
        name = func.__name__
    name = _format_name(name)
    METHODS[name] = func
    return name