from __future__ import print_function

import time

import queue

Q = queue.Queue()

Q.append(10)
Q.append(20)
print(Q.peek())
print(Q.pop())
print(Q.pop())
try:
    print(Q.pop())
except IndexError as e:
    print("Error message:", e)  # Prints "Queue is empty"

i = 10000

values = range(i)

start_time = time.time()

Q.extend(values)

end_time = time.time() - start_time

print("Adding {} items took {:1.3f} msecs.".format(i, 1000 * end_time))

for i in range(41):
    Q.pop()

Q.pop()
print("The answer is:")
print(Q.pop())