def test_delete_between(self):
even = range(0, 20, 2)
odd = range(1, 20, 2)
numbers = even + odd
numbers.sort()
sl = SkipList.SkipList()
for number in numbers:
sl.insert(number)
for number in odd:
sl.delete(number)
self.assertEqual(even, sl.skip_list_as_list())
def test_skip_list():
skip_list = SkipList.SkipList()
i = 0
for i in range(10):
skip_list.insert(i)
i += 1
skip_list.print_list()
skip_list.print_nice()
print
for i in range(10):
skip_list.delete(i)
skip_list.print_nice()
print
def compare_insertion_and_search():
rounds = int(raw_input('How many rounds of test? '))
insertions = int(
raw_input('How many insertions (nodes in the structure)? '))
top_percent = float(
raw_input('How many percent of the values are searched? '))
repeat = int(raw_input('How many times those values are searched? '))
values = random.sample(range(insertions * 10), insertions)
search_values = random.sample(values, int(top_percent * insertions / 100))
searches = search_values * repeat
random.shuffle(searches)
for round in range(rounds):
print '-' * 20
sl = SkipList.SkipList()
st = SplayTree.SplayTree()
t = Treap.Treap()
structures = [(sl, 'Skip list'), (st, 'Splay tree'), (t, 'Treap')]
print '\nInsertions:'
for structure in structures:
time_begin = time.time()
for key in range(insertions):
structure[0].insert(key)
print('Inserting ' + str(insertions) + ' values to empty ' +
structure[1] + ' took ' + str(time.time() - time_begin) +
' seconds')
print '\nSearches:'
time_begin = time.time()
for key in searches:
sl.search(key)
print('Searching ' + str(len(searches)) +
' values from skip list took ' + str(time.time() - time_begin) +
' seconds')
time_begin = time.time()
for key in searches:
st.search(st.root, key)
print('Searching ' + str(len(searches)) +
' values from splay tree took ' + str(time.time() - time_begin) +
' seconds')
time_begin = time.time()
for key in searches:
t.search(t.root, key)
print('Searching ' + str(len(searches)) + ' values from treap took ' +
str(time.time() - time_begin) + ' seconds')
def main():
# if the user sent specified 1 thing for the commandline
if (len(sys.argv) == 2):
# try to convert the thing to a positve number.
try:
count = int(sys.argv[1])
if count < 0:
sys.exit(0)
except:
print("Please enter in a positive whole number")
sys.exit(0)
#!!!Ziptree Test!!!
start_time = time.time()
ziptree = ZipTree(None)
for i in range(count):
temp = node(random.randint(0, count), None, None)
ziptree.insert(temp)
print("--- %s bytes --- ZipTree" % ziptree.getTreeSize())
for i in range(count):
temp = ziptree.find(i)
while (temp is not None):
ziptree.delete(temp)
temp = ziptree.find(i)
print("--- %s seconds --- ZipTree" % (time.time() - start_time))
#!!!Skiplist Test!!!
start_time = time.time()
skiplist = SkipList(count, 0.5)
for i in range(count):
skiplist.insertElement(random.randint(0, count))
print("--- %s bytes --- SkipList" % skiplist.getListSize())
for i in range(count):
while (skiplist.searchElement(i) is True):
skiplist.deleteElement(i)
print("--- %s seconds --- SkipList" % (time.time() - start_time))
#!!!Treap Test!!!
start_time = time.time()
treap = Treap()
for i in range(count):
treap.insert(random.randint(0, count))
print("--- %s bytes --- Treap" % treap.getTreeSize())
for i in range(count):
while (treap.find(i) is not None):
treap.delete(i)
print("--- %s seconds --- Treap" % (time.time() - start_time))
else:
print("This program takes in 1 postive integer value.")
# import random2 as r2 # learn more: https://python.org/pypi/random2 from SkipList import * # print(r2.random()) s1 = SkipList() n1 = NodoSkip(1) s1.getCabeza() # s1.inserta(n1) # s1.print()
def test_search_succesful(self):
sl = SkipList.SkipList()
for number in range(100):
sl.insert(number)
for number in [0, 11, 17, 27, 99, 50, 11, 17]:
self.assertTrue(sl.search(number) == number)
def test_search_unsuccesful(self):
sl = SkipList.SkipList()
sl.insert(1)
self.assertIsNone(sl.search(2))
def test_skip_list_as_list(self):
sl = SkipList.SkipList()
for key in range(10):
sl.insert(key)
self.assertEqual(range(10), sl.skip_list_as_list())
### Example ###
from SkipList import *
## Insert Keys
# Create a Skip List with N set to the
# desired number of elements to be stored
a = SkipList(20)
lis = list(range(20, 0,-1))
for key in lis:
a.insert(key)
a.displayList()
## Check if a key is present
print ("\nDoes the list contain 3?", a.contains(3))
## Remove a key
a.remove(3)
a.displayList()
print ("\nDoes the list contain 3?", a.contains(3))
## Return the length of the skip list
print ("\nThe length of the skip list is :", len(a))
from SkipList import * sk = SkipList([3, 2, 23, 4, 2, -1, 4, 5, -13]) print(sk) sk.erase(4) print(sk)
