98     def iterkeys(self):  member in Mailbox
104         return list(self.iterkeys())
108         for key in self.iterkeys():
124         for key in self.iterkeys():
159         for key in self.iterkeys():
398     def iterkeys(self):  member in Maildir
567             self._onetime_keys = self.iterkeys()
625     def iterkeys(self):  member in _singlefileMailbox
1079     def iterkeys(self):  member in MH
1090         return len(list(self.iterkeys()))
1204         for key in self.iterkeys():