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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 rewrite_reserved_words(func):
 """ Given a function whos kwargs need to contain a reserved word such as `in`, allow calling that function with the keyword as `in_`, such that function kwargs are rewritten to use the reserved word. """

    @partial_safe_wraps(func)
    def inner(*args, **kwargs):
        for word in RESERVED_WORDS:
            key = "{0}_".format(word)
            if key in kwargs:
                kwargs[word] = kwargs.pop(key)
        return func(*args, **kwargs)
    return inner