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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_library_progress(self):
 """Returns the reading progress for all books in the kindle library. Returns: A mapping of ASINs to `ReadingProgress` instances corresponding to the books in the current user's library. """

    kbp_dict = self._get_api_call('get_library_progress')
    return {asin: KindleCloudReaderAPI._kbp_to_progress(kbp)
            for asin, kbp in kbp_dict.iteritems()}