298                            self.join("undo"))

   298                            self.join("undo"))

   299 

   299 

   300     def recover(self, f = "journal"):

   300     def recover(self, f = "journal"):

   301         self.lock()

   301         self.lock()

   302         if os.path.exists(self.join(f)):

   302         if os.path.exists(self.join(f)):

   303             return rollback(self.opener, self.join(f))

   304             return rollback(self.opener, self.join(f))

   304 

   307 

   305     def lock(self, wait = 1):

   308     def lock(self, wait = 1):

   306         try:

   309         try:

   307             return lock.lock(self.join("lock"), 0)

   310             return lock.lock(self.join("lock"), 0)

   308         except lock.LockHeld, inst:

   311         except lock.LockHeld, inst: