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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_uncompleted_tasks(self):
 """Return all of a user's uncompleted tasks. .. warning:: Requires Todoist premium. :return: A list of uncompleted tasks. :rtype: list of :class:`pytodoist.todoist.Task` """

        tasks = (p.get_uncompleted_tasks() for p in self.get_projects())
        return list(itertools.chain.from_iterable(tasks))