#NEWLINE# def serviceTxPktsOnce( self ) : #NEWLINE# #INDENT# '\n        Service .txPkts deque once (one pkt)\n        ' #NEWLINE# if self . server . opened : #NEWLINE# #INDENT# laters = deque ( ) #NEWLINE# blockeds = [ ] #NEWLINE# if self . txPkts : #NEWLINE# #INDENT# self . _serviceOneTxPkt ( laters , blockeds ) #NEWLINE# #UNINDENT# while laters : #NEWLINE# #INDENT# self . txPkts . append ( laters . popleft ( ) )