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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 merge(self, other):
 """Merges a set of build file aliases and returns a new set of aliases containing both. Any duplicate aliases from `other` will trump. :API: public :param other: The BuildFileAliases to merge in. :type other: :class:`BuildFileAliases` :returns: A new BuildFileAliases containing `other`'s aliases merged into ours. :rtype: :class:`BuildFileAliases` """

    if not isinstance(other, BuildFileAliases):
      raise TypeError('Can only merge other BuildFileAliases, given {0}'.format(other))

    def merge(*items):
      merged = {}
      for item in items:
        merged.update(item)
      return merged

    targets = merge(self.target_types, self.target_macro_factories,
                    other.target_types, other.target_macro_factories)
    objects = merge(self.objects, other.objects)
    context_aware_object_factories=merge(self.context_aware_object_factories,
                                         other.context_aware_object_factories)
    return BuildFileAliases(targets=targets,
                            objects=objects,
                            context_aware_object_factories=context_aware_object_factories)