Double-ended Queue, Ordered dictionaries, default dictionary

deque_example.py

# Double-ended Queue
fifo = collections.deque()
fifo.append(1)      # Producer
x = fifo.popleft()  # Consumer

# OrderedDict

a = OrderedDict()
a[‘foo’] = 1
a[‘bar’] = 2
b = OrderedDict()
b[‘foo’] = ‘red’
b[‘bar’] = ‘blue’
for value1, value2 in zip(a.values(), b.values()):
     print(value1, value2)