def main():
unsorted = [random.randint(-999, 9999) for i in range(0, 25)]
print("unsorted list:", unsorted)
bubble_sort.sort(unsorted)
merge_sort.sort(unsorted)
insertion_sort.sort(unsorted)
quick_sort.sort(unsorted)
def test_sort_partially_sorts_items_compared_to_pivot(self):
values = range(10)
pivot = 5
sort(values, pivot)
smaller = values[:pivot]
larger = values[pivot + 1:]
for item in smaller:
assert item < pivot
for item in larger:
assert item > pivot
def test_sort(self):
''' Compare results of sorting a random list with insertion sort
against sorting that same list using Python's built sorting. '''
test_list = []
for x in range(10000):
test_list.append(randrange(0, 10000))
expected = sorted(test_list)
result = quick_sort.sort(test_list)
self.assertEqual(expected, result)
def pair_sum(array: list, target: int) -> tuple:
"""
Returns tuple of numbers from the array that sum up to the
given target.
Args:
array (list): list of numbers
target (int): target
Returns:
tuple: (first number, second number)
"""
sort(array)
i = 0
j = len(array) - 1
while i <= j:
if array[i] + array[j] == target:
return [array[i], array[j]]
elif array[i] + array[j] > target:
j -= 1
elif array[i] + array[j] < target:
i += 1
return [None, None]
def main():
from quick_sort import sort
print "Test quick_sort", sort, "-" * 20
L = get_random_numbers(10)
print L
print sort(L)
from merge_sort import sort
print "Test merge_sort", sort, "-" * 20
L = get_random_numbers(10)
print L
print sort(L)
from insertion_sort import sort
print "Test insertion_sort", sort, "-" * 20
L = get_random_numbers(10)
print L
print sort(L)
from radix_sort import sort
print "Test radix_sort", sort, "-" * 20
L = get_random_numbers(10)
print L
print sort(L)
from heap_sort import sort
print "Test heap_sort", sort, "-" * 20
L = get_random_numbers(10)
print L
print sort(L)
pass
def _build_test(_test, _array):
if _test == "quick sort":
_init_time = dt.now()
_array_sorted = quick_sort.sort(_array)
_end_time = dt.now()
_time_execution = (_end_time - _init_time)
return _array_sorted, _time_execution
elif _test == "comb sort":
_init_time = dt.now()
_array_sorted = comb_sort.sort(_array)
_end_time = dt.now()
_time_execution = (_end_time - _init_time)
return _array_sorted, _time_execution
else:
return 0
def test_sort_ok(self):
result = qs.sort(self.unsorted)
self.assertEqual(result, self.sorted)
def test_sort_length(self):
result = qs.sort(self.unsorted)
self.assertEqual(len(result), len(self.unsorted))
import selection_sort
import sieve_of_eratosthenes
import transposition_cipher
""" SORTING """
bubble_sort.sort(array=[3, 2, 11, -1, 0])
array = [0.48, 0.27, 0.12, 0.21, 0.43, 0.25]
bucket_sort.sort(array, max_value=max(array))
insertion_sort.sort(array=[3, 2, 11, -1, 0])
merge_sort.sort(array=[3, 2, 11, -1, 0])
array = [3, 2, 11, -1, 0]
quick_sort.sort(array, left=0, right=len(array) - 1)
selection_sort.sort(array=[3, 2, 11, -1, 0])
lexicographic_order.order(words=['aab', 'aaa', 'aa', 'aaa'])
""" SEARCHING """
pattern_search.search(text=list('karykatura'), pattern=list('ka'))
bisection_root_finding.bisect(a=-4, b=4, error=0.001)
bisection_search.search(array=[-1, 0, 2, 3, 11], target=3)
""" STRING OPS """
anagram.anagram(word1=list('arbuz'), word2=list('burza'))
from partition import randomized_partition
from random import randint
def random_array(length, min=-100, max=100):
array = list()
for _ in range(length):
array.append(randint(min, max))
return array
#select_arr = random_array(30, -100, 100)
select_arr = [1, 2, 3]
print(select_arr)
median = quick_select.select(select_arr,
len(select_arr) // 2 + 1, simple_partition)
if len(select_arr) % 2 == 0:
median2 = quick_select.select(select_arr,
len(select_arr) // 2, simple_partition)
median = (median + median2) / 2
print(select_arr)
quick_sort.sort(select_arr, randomized_partition)
print(select_arr)
print(median)
#arr = random_array(500)
#arr2 = arr.copy()
#print(timeit.timeit(lambda: quick_sort.sort(arr, simple_partition), number=100))
#print(timeit.timeit(lambda: quick_sort.sort(arr2, randomized_partition), number=100))
def test_sortrandorder(self):
arr = [random.randint(0, 10000) for i in xrange(0, 10000)]
sortarr = sort(arr)
for i in xrange(1, 10000):
self.assertGreaterEqual(sortarr[i], sortarr[i-1])
def test_an_allready_sorted_array_returns_the_same_array(self):
assert sort([1,2]) == [1,2]
return -1
def search_last_less(items, target):
"""
查找最后一个小于等于给定值的元素
"""
left, right = 0, len(items) - 1
while left <= right:
mid = left + ((right - left) >> 1)
if items[mid] <= target:
if mid == len(items) - 1 or items[mid + 1] > target:
return mid
left = mid + 1
else:
right = mid - 1
return -1
if __name__ == '__main__':
items = [random.randint(1, 10) for _ in range(20)]
sort(items)
print(f'Before: {items}')
for _ in range(5):
target = random.randint(1, 10)
print(f'Target={target}, index={search_last_less(items, target)}, value={items[search_last_less(items, target)]}')
def should_sort_with_quick_sort_with_dups():
a = rand.randint(20, size=40).tolist()
expected = sorted(a)
quick_sort.sort(a)
assert expected == a
def test_sortrandorder(self):
arr = [random.randint(0, 10000) for i in xrange(0, 10000)]
sortarr = sort(arr)
for i in xrange(1, 10000):
self.assertGreaterEqual(sortarr[i], sortarr[i - 1])
def test_sort_revorder(self):
arr = [i for i in xrange(10000, 0, -1)]
sortarr = sort(arr)
for i in xrange(1, 10000):
self.assertGreaterEqual(sortarr[i], sortarr[i - 1])
def test_sort_returns_an_array_that_is_sorted_lowest_to_highest(self):
assert sort([2,1]) == [1,2]
def test_a_large_array_is_sorted_lowest_to_highest(self):
assert sort(shuffle([1,2,3,4,5,6,7,8,9,10])) == [1,2,3,4,5,6,7,8,9,10]
def test_a_more_complicated_array_is_sorted_lowest_to_highest(self):
assert sort([4,2,3,1]) == [1,2,3,4]
from quick_sort import sort
def binary_search(low, high, key):
if high >= low:
mid = int(low + (high - low) / 2)
if key == array[mid]:
return mid
elif key > array[mid]:
return binary_search(mid, high, key)
else:
return binary_search(low, mid, key)
else:
return -1
array = [5, 23, 45, 34, 12, 4, 55, 43, 89, 99, 999]
sort(array) # sort array using quick sort
key = 43
print(binary_search(0, len(array), key))
def test_quick(self):
for array in self.test_array:
self.assertEqual(quick_sort.sort(array), sorted(array))
def should_sort_with_quick_sort_with_dups():
a = rand.randint(20, size=40).tolist()
expected = sorted(a)
quick_sort.sort(a)
assert expected == a
def test_sort_revorder(self):
arr = [i for i in xrange(10000, 0, -1)]
sortarr = sort(arr)
for i in xrange(1, 10000):
self.assertGreaterEqual(sortarr[i], sortarr[i-1])
def test_correctness(self):
self.assertListEqual(sort([]), [])
self.assertListEqual(sort([1]), [1])
self.assertListEqual(sort([2, 1]), [1, 2])
self.assertListEqual(sort([2, 1, 3]), [1, 2, 3])
self.assertListEqual(sort([2, 1, 3, 3]), [1, 2, 3, 3])
self.assertListEqual(sort([2, 2, 1, 3, 3]), [1, 2, 2, 3, 3])
self.assertListEqual(sort([1, 2, 3]), [1, 2, 3])
self.assertListEqual(sort([1, 2, 3, 4]), [1, 2, 3, 4])
self.assertListEqual(sort([1, 2, 1, 4]), [1, 1, 2, 4])
self.assertListEqual(sort([1, 2, 1, 2, 4]), [1, 1, 2, 2, 4])
self.assertListEqual(sort([1, 2, 1, 2, 2]), [1, 1, 2, 2, 2])