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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 get_list(self, key, fallback=None, split=","):
 """ Retrieve a value in list form. The interpolated value will be split on some key (by default, ',') and the resulting list will be returned. Arguments: key - the key to return fallback - The result to return if key isn't in the component. By default, this will be an empty list. split - The key to split the value on. By default, a comma (,). """

        fallback = fallback or []
        raw = self.get(key, None)
        if raw:
            return [value.strip() for value in raw.split(split)]
        return fallback