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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 add_locations(self, locations):
 """Add extra locations to AstralGeocoder. Extra locations can be * A single string containing one or more locations separated by a newline. * A list of strings * A list of lists/tuples that are passed to a :class:`Location` constructor """


        if isinstance(locations, (str, ustr)):
            self._add_from_str(locations)
        elif isinstance(locations, (list, tuple)):
            self._add_from_list(locations)