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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 read(self, filename, encoding='utf-8', marker_map=None, entry_impl=Entry, entry_sep='\n\n', entry_prefix=None, keep_empty=False):
 """Extend the list by parsing new entries from a file. :param filename: :param encoding: :param marker_map: A dict used to map marker names. :param entry_impl: Subclass of Entry or None :param entry_sep: :param entry_prefix: """

        marker_map = marker_map or {}
        for entry in parse(
                filename,
                encoding,
                entry_sep,
                entry_prefix or entry_sep,
                keep_empty=keep_empty):
            if entry:
                self.append(entry_impl([(marker_map.get(k, k), v) for k, v in entry]))