python get item from queue
"""put and get items from queue"""
>>> from Queue import Queue
>>> q = Queue()
>>> q.put(1)
>>> q.put(2)
>>> q.put(3)
>>> print list(q.queue)
[1, 2, 3]
>>> q.get()
1
>>> print list(q.queue)
[2, 3]python get item from queue
"""put and get items from queue"""
>>> from Queue import Queue
>>> q = Queue()
>>> q.put(1)
>>> q.put(2)
>>> q.put(3)
>>> print list(q.queue)
[1, 2, 3]
>>> q.get()
1
>>> print list(q.queue)
[2, 3]python threading queue
import threading, queue
q = queue.Queue()
def worker():
while True:
item = q.get()
print(f'Working on {item}')
print(f'Finished {item}')
q.task_done()
# turn-on the worker thread
threading.Thread(target=worker, daemon=True).start()
# send thirty task requests to the worker
for item in range(30):
q.put(item)
print('All task requests sentn', end='')
# block until all tasks are done
q.join()
print('All work completed')python queue.priority queue
from queue import PriorityQueue
class PqElement(object):
def __init__(self, value: int):
self.val = value
#Custom Compare Function (less than or equsal)
def __lt__(self, other):
"""self < obj."""
return self.val > other.val
#Print each element function
def __repr__(self):
return f'PQE:{self.val}'
#Usage-
pq = PriorityQueue()
pq.put(PqElement(v)) #Add Item - O(Log(n))
topValue = pq.get() #Pop top item - O(1)
topValue = pq.queue[0].val #Get top value - O(1)queue in python
#creating a queue using list
#defining a list
my_queue =[]
#inserting the items in the queue
my_queue.append(1)
my_queue.append(2)
my_queue.append(3)
my_queue.append(4)
my_queue.append(5)
print("The items in queue:")
print(my_queue)
#removing items from queue
print(my_queue.pop(0))
print(my_queue.pop(0))
print(my_queue.pop(0))
print(my_queue.pop(0))
#printing the queue after removing the elements
print("The items in queue:")
print(my_queue)Copyright © 2021 Codeinu
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