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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 _identifier_as_cid(self, identifier):
 """ Returns a container uuid for identifier. If identifier is an image UUID or image tag, create a temporary container and return its uuid. """

        def __cname_matches(container, identifier):
            return any([n for n in (container['Names'] or [])
                        if matches(n, '/' + identifier)])

        # Determine if identifier is a container
        containers = [c['Id'] for c in self.client.containers(all=True)
                      if (__cname_matches(c, identifier) or
                          matches(c['Id'], identifier + '*'))]

        if len(containers) > 1:
            raise SelectionMatchError(identifier, containers)
        elif len(containers) == 1:
            c = containers[0]
            return self._clone(c)

        # Determine if identifier is an image UUID
        images = [i for i in set(self.client.images(all=True, quiet=True))
                  if i.startswith(identifier)]

        if len(images) > 1:
            raise SelectionMatchError(identifier, images)
        elif len(images) == 1:
            return self._create_temp_container(images[0])

        # Match image tag.
        images = util.image_by_name(identifier)
        if len(images) > 1:
            tags = [t for i in images for t in i['RepoTags']]
            raise SelectionMatchError(identifier, tags)
        elif len(images) == 1:
            return self._create_temp_container(images[0]['Id'].replace("sha256:", ""))

        raise MountError('{} did not match any image or container.'
                         ''.format(identifier))