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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 prepend_string_list(self, key, value, max_length_key):
 """Prepend a fixed-length string list with a new string. The oldest string will be removed from the list. If the string is already in the list, it is shuffled to the top. Use this to implement things like a 'most recent files' entry. """

        max_len = self.get(max_length_key)
        strings = self.get_string_list(key)
        strings = [value] + [x for x in strings if x != value]
        strings = strings[:max_len]

        self.beginWriteArray(key)
        for i in range(len(strings)):
            self.setArrayIndex(i)
            self.setValue("entry", strings[i])
        self.endArray()