<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def publish_for_collection(self, collection_name):
 """ Run the publishing operations for a given collection :param str collection_name: """

        self.revisions = BaseAsyncMotorDocument("%s_revisions" % collection_name, self.settings)

        changes = yield self.__get_pending_revisions()

        if len(changes) > 0:

            self.logger.info("%s revisions will be actioned" % len(changes))

            for change in changes:
                try:
                    self.logger.info("Applying %s action %s - %s to document: %s/%s" % (change.get("action"), change.get("id"), change.get("meta",{}).get("comment", "No Comment"), change.get("collection"), change.get("master_id")))

                    stack = AsyncSchedulableDocumentRevisionStack(
                        change.get("collection"),
                        self.settings,
                        master_id=change.get("master_id")
                    )

                    revision = yield stack.pop()

                    self.logger.debug(revision)

                except Exception as ex:
                    self.logger.error(ex)