-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathqueue_application.py
More file actions
100 lines (75 loc) · 2.37 KB
/
queue_application.py
File metadata and controls
100 lines (75 loc) · 2.37 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
from random import randint
class Node(object):
""" A Doubly-linked lists' node. """
def __init__(self, data=None, next=None, prev=None):
self.data = data
self.next = next
self.prev = prev
class Queue(object):
""" A doubly-linked list. """
def __init__(self):
self.head = None
self.tail = None
self.count = 0
def enqueue(self, data):
""" Append an item to the list. """
new_node = Node(data, None, None)
if self.head is None:
self.head = new_node
self.tail = self.head
else:
new_node.prev = self.tail
self.tail.next = new_node
self.tail = new_node
self.count += 1
def dequeue(self):
""" Remove elements from the front of the list"""
current = self.head
if self.count == 1:
self.count -= 1
self.head = None
self.tail = None
elif self.count > 1:
self.head = self.head.next
self.head.prev = None
self.count -= 1
return current
queue = Queue()
import time
start_time = time.time()
for i in range(100000):
queue.enqueue(i)
for i in range(100000):
queue.dequeue()
print("--- %s seconds ---" % (time.time() - start_time))
class Track:
def __init__(self, title=None):
self.title = title
self.length = randint(5, 10)
track1 = Track("white whistle")
track2 = Track("butter butter")
print(track1.length)
print(track2.length)
import time
class MediaPlayerQueue(Queue):
def __init__(self):
super(MediaPlayerQueue, self).__init__()
def add_track(self, track):
self.enqueue(track)
def play(self):
while self.count > 0:
current_track_node = self.dequeue()
print("Now playing {}".format(current_track_node.data.title))
time.sleep(current_track_node.data.length)
track1 = Track("white whistle")
track2 = Track("butter butter")
track3 = Track("Oh black star")
track4 = Track("Watch that chicken")
track5 = Track("Don't go")
media_player = MediaPlayerQueue()
media_player.add_track(track1)
media_player.add_track(track2)
media_player.add_track(track3)
media_player.add_track(track4)
media_player.add_track(track5)
media_player.play()