nextsource

Because the double-ended queue is thread-safe, you can leverage the contents of the queue from both ends in different threads. Import collectionsimport Threadingimport timecandle = Collections.deque (xrange (5)) def Burn (Direction, Nextsource): While True: try: next = Nextsource () except Indexerror: break else: print '%8s:%s '% ( direction, next) Time.sleep (0.1) print '%8s done '% direction

element from the left side of the deque. From ' right: G F E d C b A ' left : 0 1 2 3 4 5 Because a two-terminal queue is thread-safe, the contents of the queue can be leveraged from both ends in different threads. Import Collections Import threading import time candle = Collections.deque (xrange (5)) def Burn ( Direction, Nextsource): While True: try: next = Nextsource () e

= collections.deque()d2.extendleft(xrange(6))print 'extendleft', d2d2.appendleft(6)print 'appendleft', d2 2. pop/popleft from collections import collectionsprint "From the right:"d = collections.deque('abcdefg')while True: try: print d.pop(), except IndexError: breakprintprint "\nFrom the left:"d = collections.deque(xrange(6))while True: try: print d.popleft(), except IndexError: breakprint Because the dual-end queue is thread-safe, the queue content can be used from both ends in different

from the right side of deque, and use popleft () to delete an element from the left side of deque. From the right:g f e d c b aFrom the left:0 1 2 3 4 5 Because the dual-end queue is thread-safe, the queue content can be used from both ends in different threads at the same time. import collectionsimport threadingimport timecandle = collections.deque(xrange(5))def burn(direction, nextSource): while True: try: next =

(),exceptIndexerror: Break Print The output is: From the right G F E D c B A From the left 0 1 2 3 4 5 Finally, it is worth mentioning that deque is thread-safe, meaning that you can operate from the left and right side of the Deque collection at the same time without affecting it, see the following code: ImportCollectionsImportThreadingImportTime Candle=collections.deque (Xrange (5)) defBurn (direction,nextsource