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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 register_aliases(self, aliases):
 """Registers the given aliases to be exposed in parsed BUILD files. :param aliases: The BuildFileAliases to register. :type aliases: :class:`pants.build_graph.build_file_aliases.BuildFileAliases` """

    if not isinstance(aliases, BuildFileAliases):
      raise TypeError('The aliases must be a BuildFileAliases, given {}'.format(aliases))

    for alias, target_type in aliases.target_types.items():
      self._register_target_alias(alias, target_type)

    for alias, target_macro_factory in aliases.target_macro_factories.items():
      self._register_target_macro_factory_alias(alias, target_macro_factory)

    for alias, obj in aliases.objects.items():
      self._register_exposed_object(alias, obj)

    for alias, context_aware_object_factory in aliases.context_aware_object_factories.items():
      self._register_exposed_context_aware_object_factory(alias, context_aware_object_factory)