264         """commit the current session's transaction"""

   264         """commit the current session's transaction"""

   265         if self.pool is None:

   265         if self.pool is None:

   266             assert not self.pending_operations

   266             assert not self.pending_operations

   267             self.transaction_data.clear()

   267             self.transaction_data.clear()

   268             self._touch()

   268             self._touch()

   269             return

   270             return

   270         if self.commit_state:

   271         if self.commit_state:

   271             return

   272             return

   272         # on rollback, an operation should have the following state

   273         # on rollback, an operation should have the following state

   273         # information:

   274         # information:

   305         """rollback the current session's transaction"""

   306         """rollback the current session's transaction"""

   306         if self.pool is None:

   307         if self.pool is None:

   307             assert not self.pending_operations

   308             assert not self.pending_operations

   308             self.transaction_data.clear()

   309             self.transaction_data.clear()

   309             self._touch()

   310             self._touch()

   310             return

   312             return

   311         try:

   313         try:

   312             while self.pending_operations:

   314             while self.pending_operations:

   313                 try:

   315                 try:

   314                     operation = self.pending_operations.pop(0)

   316                     operation = self.pending_operations.pop(0)