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')queues in python
class Queue:
def __init__(self, capacity):
self.front = self.size = 0
self.rear = capacity - 1
self.Q = [None] * capacity
self.capacity = capacity
def isFull(self):
return self.size == self.capacity
def isEmpty(self):
return self.size == 0
def EnQueue(self, item):
if self.isFull():
print("Full")
return
self.rear = (self.rear + 1) % (self.capacity)
self.Q[self.rear] = item
self.size = self.size + 1
print("%s enqueue to queue" %str(item))
def DeQueue(self):
if self.isEmpty():
return "Empty"
print("%s dequeued from queue" %str(self.Q[self.front]))
self.front = (self.front + 1) % (self.capacity)
self.size = self.size - 1
def que_front(self):
if self.isEmpty():
print("The Queue is empty")
print("Front item is ", self.Q[self.front])
def que_rear(self):
if self.isEmpty():
print("Queue is Empty")
print("The rear item is ", self.Q[self.rear])
queue = Queue(30)
queue.EnQueue(10)
queue.EnQueue(20)
queue.EnQueue(30)
queue.EnQueue(40)
queue.EnQueue(50)
queue.que_front()
print()
queue.DeQueue()
queue.que_front()
queue.que_rear()
print()
queue.DeQueue()
queue.que_front()
queue.que_rear()python list as queue
# Demonstrate queue implementation using list
# Initializing a queue
queue = []
# Adding elements to the queue
queue.append('a')
queue.append('b')
print(queue)
# Removing elements from the queue
print("nElements dequeued from queue")
print(queue.pop(0))
print(queue.pop(0))
print("nQueue after removing elements")
print(queue)
# print(queue.pop(0)) will raise and IndexError as the queue is now emptyqueue 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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