def test_collisions():
h = HashTable()
h.add(25, "foo")
h.add(125, "bar")
assert len(h.data[25]) == 2
assert h.get(25) == "foo"
assert h.get(125) == "bar"
class Scanner:
def __init__(self, problem_file, tokens, separators):
self.__problem_file = problem_file
self.__tokens = tokens
self.__separators = separators
self.__pif = HashTable()
self.__st = SymbolTable()
def scan(self):
line_count = 0
for line in self.__problem_file.read().splitlines():
line_count += 1
for token in self.tokenize(line):
if token in self.__tokens:
self.__pif.add(token, (-1, 1))
elif isinstance(token, Identifier) or isinstance(
token, Constant):
token_id = self.__st.add(token)
self.__pif.add(token, token_id)
else:
print('Lexical error for token:', token, ', at line:',
str(line_count))
return
def tokenize(self, line):
return line.split(str(self.__separators))
def get_pif(self):
return self.__pif
def get_st(self):
return self.__st
class SymbolTable:
def __init__(self):
self.table = HashTable()
self.checkingTable = {}
def add(self, new_entry):
entry = self.checkingTable.get(new_entry.get_key())
if entry is None:
self.checkingTable[new_entry.get_key()] = new_entry.get_value()
self.table.add(new_entry.get_key(), new_entry.get_value())
else:
if isinstance(new_entry, Identifier):
self.table.add(new_entry.get_key(), new_entry.get_value())
return new_entry.get_key()
def get(self, key):
return self.table.get(key)
def get_table(self):
return self.table.items()
def __str__(self):
return str(self.table.items())
def print_symbol_table(self):
for key in self.table.items():
value = self.table.items()[key]
print("{ ID:", value[0], ", Value:", value[1], "}")
def test_add_multiple():
ht = HashTable()
ht.add('one', 1)
ht.add('two', 2)
ht.add('three', 3)
assert ht.contains('one') == True
assert ht.contains('two') == True
assert ht.contains('three') == True
def form_parametrize_add():
"""Forming parameters for testing function add"""
dict_1 = {item: item ** 2 for item in range(100)}
dict_2 = HashTable(100)
result = []
for i in range(100):
dict_2.add(str(i), i ** 2)
result.append((dict_2[str(i)], dict_1.get(i)))
return result
def test_add_method():
hash_table = HashTable()
# add first key-value pair
hash_table.add("Cat", "Frodo")
# check if index that not 808 still has '0' in it
assert hash_table._array[809] == 0
# check if index 808 not '0' anymore
assert hash_table._array[808] != 0
assert hash_table._array[808].head.key == "Cat"
assert hash_table._array[808].head.value == "Frodo"
assert hash_table._array[808].head.next == None
class BETrainingModel:
def __init__(self, model_path='default_model', beam_size=1):
self.model_path, self.model_name = split_path(model_path)
self.beam_size = beam_size
self.perceptron = None
self.label_hash = HashTable()
def save(self):
labels_file = self.create_file_with_extension('label')
self.label_hash.save_file(labels_file)
with open(self.create_file_with_extension(), 'w') as model_file:
model_file.write(str(self.beam_size) + '\n')
model_file.write(str(labels_file) + '\n')
model_file.write(
str(self.create_file_with_extension('weights')) + '\n')
def setup_model(self, corpus_file):
# index dependency label
for label in get_label_conll(corpus_file):
self.label_hash.add(label)
n_class = len(self.label_hash) * 2
self.perceptron = MultitronParameters(n_class)
self.save()
def save_weight_file(self, iter):
weights_file_path = self.create_file_with_extension('weights.' + iter)
self.perceptron.dump_fin(file(weights_file_path, 'w'))
def update_perceptron_counter(self):
self.perceptron.tick()
def create_file_with_extension(self, ext=''):
return os.path.join(self.model_path, self.model_name + '.' + ext)
def get_scores(self, features):
return self.perceptron.get_scores(features)
def update_paramaters(self, features, cls, value):
self.perceptron.add(features, cls, value)
@classmethod
def load(cls, model_path):
model_dir, model_file = split_path(model_path)
with open(model_path, 'r') as f:
beam_size = int(f.readline().strip())
label_hash_file = f.readline().strip()
label_hash = load_hash_from_file(label_hash_file)
weights_file_path = f.readline().strip() + ".FINAL"
perceptron = MulticlassModel(weights_file_path)
return cls(model_path, beam_size, perceptron, label_hash)
def hash_table_test():
# Create hash table
h = HashTable()
# Populate it
for _ in range(100):
h.add(random_element())
h.add(Element('topher', 1337))
# Print the table
h.print()
# Try a find
print(h.find('topher').output())
def test_get():
one = HashTable()
one.add('fond','enamored')
one.add('wrath', 'anger')
one.add('diligent', 'employed')
one.add('outfit', 'garb')
one.add('guide', 'usher')
assert one.get('fond') == 'enamored'
def store_package_table(package_file):
# packages with delivery addresses
package_hash = HashTable()
for item in package_to_list(package_file):
# Delivery Status is initialized to In Hub
current_location = 'At Hub'
if 'Delayed' in item[7]:
# findall would be bound by a constant so this line is O(1)
match = re.findall(r'\d{1,2}:\d{2}\s\w{2}', item[7])
current_location = 'Arriving at ' + match[0]
package_value = [current_location, 'Not On Truck', 'Not Delivered']
for index in range(1, 8):
package_value.append(item[index])
# sets the package ID as a key and a list of delivery status, address, city, state, zip, deadline, and
# notes as a value.
package_hash.add(int(item[0]), package_value)
return package_hash
def test_hash_table(self):
hash_table = HashTable(3)
hash_table.add("key1", "val1")
hash_table.add("key2", "val2")
hash_table.add("key3", "val3")
hash_table.add("", "val_blank")
hash_table.add("key_none", None)
hash_table.delete("key2")
self.assertEqual("val1", hash_table.get("key1"))
self.assertEqual("val_blank", hash_table.get(""))
self.assertIsNone(hash_table.get("key_none"))
self.assertIsNone(hash_table.get("key2"))
self.assertIsNone(hash_table.get("hoge"))
self.assertRaises(Exception, hash_table.get, None)
graph2 = Graph()
graph3 = Graph()
route1 = Route()
route2 = Route()
route3 = Route()
# Reading in data from package file
# Time Complexity: O(N)
# Space Complexity: O(N)
with open('WGUPS Package File.csv', mode='r', encoding='utf-8-sig') as packages:
string = packages.readlines()
for _ in range(40):
aaa, bbb, ccc, ddd, eee, fff, ggg, hhh = string[_].split(sep=',', maxsplit=7)
ccc = ccc + ', ' + ddd
aaa = int(float(aaa))
package_object.add(aaa, Package(aaa, bbb, ccc, eee, fff, ggg, hhh))
# Create an array for inclusion in adjacency list from WGUPS Distance Table
#
with open('WGUPS Distance Table.csv', mode='r', encoding='utf-8-sig') as distances:
string = distances.readlines()
distances_list = []
temp_list = []
# Time Complexity: O(N^2)
# Space Complexity: O(N)
def get_missing_values():
start_index = 0
end_index = 1
for x_one in range(0, num_locations):
class TestLinkedList(unittest.TestCase):
def setUp(self):
self.ht = HashTable()
self.ht.add(1, 'hello')
self.ht.add(2, 'hi')
self.ht.add(3, 'how')
self.ht.add('foo', 'are')
self.ht.add(5, 'foo')
self.ht.add(36, 'bar')
self.ht.add('a', 'baz')
def test_add(self):
self.assertEqual(self.ht[1], 'hello')
self.assertEqual(self.ht[3], 'how')
self.assertEqual(self.ht['foo'], 'are')
self.assertEqual(self.ht['a'], 'baz')
self.ht.add(1, 'Modified')
self.assertEqual(self.ht[1], 'Modified')
self.assertEqual(self.ht.getSize(), 7)
self.assertEqual(self.ht.getCapacity(), 12)
def test_remove(self):
self.assertEqual(self.ht.remove(1), True)
self.assertIsNone(self.ht[1])
self.assertEqual(self.ht.remove('ab'), False)
def test_aux_methods(self):
self.assertEqual(self.ht.getSize(), 7)
self.assertEqual(self.ht.getCapacity(), 12)
self.ht.add(55, 'foo')
self.ht.add(1, 'bar')
self.ht.add('random', 'baz')
self.assertEqual(self.ht.getSize(), 9)
self.assertEqual(self.ht.getCapacity(), 24)
class Graph:
main_adj_list = HashTable(27)
# Time Complexity: O(1)
# Space Complexity: O(1)
def __init__(self):
self.node_id = 0
self.num_vertices = 0
self.is_first = True
self.memo_dest_list = []
self.alt_dest_list = []
self.dest_list = []
self.path_list = []
self.memo = []
self.back_to_node0 = []
self.removal_list = []
self.min_element = [500, 500]
self.main_path_sum = 0.0
self.node0_path_sum = 0.0
self.total_path_sum = 0.0
self.last_min_value = []
self.edges_list = HashTable()
# Add vertices
# Time Complexity: O(1)
# Space Complexity: O(1)
def add_vertex(self, node_id):
new_node = Node(node_id)
self.node_id = new_node.node_id
# print(f'Get_node_id: {node_id}')
self.dest_list.append(node_id)
# self.show_destinations()
self.num_vertices += 1
# Add edges
# Time Complexity: O(1)
# Space Complexity: O(1)
def add_edge(self, src_node_id, dest_node_id, miles):
new_edge = Edge(src_node_id, dest_node_id, miles)
self.edges_list.add(src_node_id, new_edge)
# Time Complexity: O(1)
# Space Complexity: O(1)
def show_destinations(self):
return print(f'Destinations: {self.dest_list}')
# Time Complexity: O(N)
# Space Complexity: O(1)
def find_shortest_path(self, source_id):
source_id = int(source_id)
if self.is_first:
self.path_list.append([source_id, 0])
self.is_first = False
find_list = list((self.main_adj_list.get(source_id))[1])
find_list = [float(i) for i in find_list]
self.dest_list = [int(i) for i in self.dest_list]
if len(self.memo_dest_list) == 0:
self.memo_dest_list = self.dest_list # Make a copy of destinations for later
else:
self.dest_list = self.memo_dest_list
if source_id == [self.dest_list[x] for x in range(len(self.dest_list))]:
self.dest_list.remove(source_id)
self.dest_list = set(self.dest_list)
self.alt_dest_list = self.dest_list.copy() # Create copy of dest_list for alternative route
direct_path_x = []
# Time Complexity: O(N^2)
# Space Complexity: O(N)
def iteration(list_a, remove_a=None):
if remove_a is None:
remove_a = []
else:
remove_a = list(remove_a)
# Time Complexity: O(N)
# Space Complexity: O(1)
if len(remove_a) != 0:
for r in range(len(remove_a)):
self.alt_dest_list.remove(remove_a[r])
x = 0
# Time Complexity: O(N^2)
# Space Complexity: O(N)
for each in list_a:
for every_d in self.alt_dest_list:
if each != 0.0:
if every_d == x:
direct_path_x.append(['{} -->'.format(source_id), x, find_list[x]])
if each < self.min_element[1]:
self.min_element = [x, each]
else:
continue
x += 1
return self.min_element
last_key = -1
itt = []
# Time Complexity: O(N)
# Space Complexity: O(N)
while last_key not in self.dest_list:
if len(self.removal_list) == len(self.dest_list):
itt = self.last_min_value
break
itt = iteration(find_list, self.removal_list)
self.last_min_value = itt
last_key = itt[0]
if itt[0] != 500:
self.removal_list.append(itt[0])
find_list = list(self.main_adj_list.get(itt[0])[1])
if not itt:
itt = list(self.last_min_value)
if [13, 7.2] in self.path_list and len(self.path_list) != len(self.dest_list) + 4: # to accommodate the values manually deleted
if itt[0] in self.dest_list:
self.path_list.append(itt)
self.dest_list.remove(itt[0])
self.dest_list = list(self.dest_list)
self.min_element = [500, 500]
self.main_path_sum += itt[1]
return itt
else:
return
elif [13, 7.2] not in self.path_list and len(self.path_list) != len(self.dest_list) + 1:
if itt[0] in self.dest_list:
self.path_list.append(itt)
self.dest_list.remove(itt[0])
self.dest_list = list(self.dest_list)
self.min_element = [500, 500]
self.main_path_sum += itt[1]
return itt
else:
return
else:
return itt
# Time Complexity: O(N)
# Space Complexity: O(1)
def go_home(self, source_id):
source_id = int(source_id)
find_list = list((self.main_adj_list.get(source_id))[1])
find_list = [float(i) for i in find_list]
min_value = [0, find_list[0]]
self.path_list.append(min_value)
self.node0_path_sum += min_value[1]
return min_value
# Time Complexity: O(1)
# Space Complexity: O(1)
def show_path(self):
return self.path_list
def test_insertion():
h = HashTable()
h.add(48, "teststring")
assert h.get(48) == "teststring"
#!/usr/local/bin/python3
from hash_table import HashTable
if __name__ == '__main__':
ht = HashTable()
print("Current number of elements: ", ht._n)
print("Current table capacity: ", len(ht._table))
print("Adding (1, one) pair...")
ht.add(1, "one")
print("Adding (2, two) pair...")
ht.add(2, "two")
print("Adding (3, three) pair...")
ht.add(3, "three")
print("Current number of elements: ", ht._n)
print("Does key 2 exists?")
if ht.exists(2):
print("yes")
else:
print("no")
print("Get value of key 1: ", ht.get(1))
print("Get value of key 2: ", ht.get(2))
print("Get value of key 3: ", ht.get(3))
print("Removing element with key 2")
ht.remove(2)
print("Does key 2 exists?")
if ht.exists(2):
print("yes")
else:
print("no")
def test_get_key():
hashtable = HashTable()
hashtable.add('reeses puffs', '9 out of 10 rating')
actual = hashtable.get('reeses puffs')
expected = '9 out of 10 rating'
assert actual == expected
def my_hash_table():
hash_table = HashTable()
# add first key-value pair on the index 808
hash_table.add("Cat", "Frodo")
hash_table.add("Dog", "Sam")
hash_table.add("goD", "Zeus")
hash_table.add("ogD", "test test")
hash_table.add("NewKey", "new value")
hash_table.add(12, "int key")
hash_table.add(0.57, "float key")
return hash_table
def test_contains():
ht = HashTable()
ht.add('four', 4)
assert ht.contains('four') == True
assert ht.contains('whale') == False
def test_replacement():
h = HashTable()
h.add(12, "foo")
h.add(12, "bar")
assert h.get(12) == "bar"
def test_hash_table():
hash_table = HashTable(1024)
hash_table.add("Guitar", "Gibson")
hash_table.add("Bass", "Fender")
hash_table.add("symbol", "Zildjan")
hash_table.add("car", "tesla")
hash_table.add("NewKey", "new value")
hash_table.add(10, "int key")
hash_table.add(0.5, "float key")
return hash_table
def test_left_join_no_matches():
one = HashTable()
one.add('pond','enamored')
one.add('rath', 'anger')
one.add('adiligent', 'employed')
one.add('poutfit', 'garb')
one.add('hangguide', 'usher')
two = HashTable()
two.add('fond', 'averse')
two.add('wrath', 'delight')
two.add('diligent', 'idle')
two.add('guide', 'follow')
two.add('flow', 'jam')
assert left_join(one, two) == [['poutfit', 'garb', None], ['hangguide', 'usher', None], ['rath', 'anger', None], ['pond', 'enamored', None], ['adiligent', 'employed', None]]
def test_get():
ht = HashTable()
ht.add('five', 5)
assert ht.get('five') == 5
assert ht.get('tiger') == None
class HashTableTest(TestCase):
def setUp(self) -> None:
self.hash_table = HashTable()
def test_attributes(self):
self.assertEqual(4, len(self.hash_table.keys))
self.assertEqual(4, len(self.hash_table.values))
self.assertEqual(4, self.hash_table.capacity)
def test_with_available_space(self):
self.hash_table.add("Bobby", "5")
self.assertEqual(1, self.hash_table.actual_length)
self.assertEqual(4, self.hash_table.capacity)
self.assertEqual("5", self.hash_table["Bobby"])
def test_without_available_space_increase_size(self):
for number in range(1, self.hash_table.capacity + 1):
self.hash_table.add(f"test_{number}", f"value_{number}")
self.assertEqual(4, self.hash_table.actual_length)
self.assertEqual(4, self.hash_table.capacity)
self.hash_table.add("test_5", "value_5")
self.assertEqual(5, self.hash_table.actual_length)
self.assertEqual(8, self.hash_table.capacity)
self.assertIn("test_5", self.hash_table.keys)
def test_value_replaced_if_key_exist(self):
self.hash_table.add("Bobby", "5")
self.assertEqual("5", self.hash_table["Bobby"])
self.hash_table["Bobby"] = "6"
self.assertEqual("6", self.hash_table["Bobby"])
def test_get_existing_key(self):
self.hash_table.add("Bobby", "5")
self.assertEqual("5", self.hash_table.get("Bobby"))
def test_get_no_existing_key(self):
self.hash_table.add("Bobby", "5")
self.assertIsNone(self.hash_table.get("B"))
def test_representation(self):
self.hash_table.add("Bobby", "5")
self.assertEqual("{Bobby: 5}", str(self.hash_table))
def test_add_hash_table():
hashtable = HashTable()
hashtable.add('spam', "fried egg")
actual = hashtable.get('spam')
expected = 'fried egg'
assert actual == expected
def test_add_key():
ht = HashTable()
ht.add('keyTest', 1)
assert ht.contains('keyTest') == True
def test_get_value_from_key():
hashtable = HashTable()
hashtable.add('cheerios', '1 out of 10 rating')
hashtable.add('ct crunch', '8 out of 10 rating')
assert hashtable.get('ct crunch') == '8 out of 10 rating'
assert hashtable.get('cheerios') == '1 out of 10 rating'
words[i] = "<<"
del words[i+1]
if words[i] == ">" and words[i+1] == ">":
words[i] = ">>"
del words[i+1]
if words[i] == "-" and isIntConstant(words[i+1]):
words[i] = "-" + words[i+1]
del words[i+1]
i += 1
for word in words:
if word in reserved_words:
pif[word] = -1
elif isIntConstant(word):
position = st.add(word)
pif[word] = position
elif isStringConstant(word):
position = st.add(word)
pif[word] = position
elif isCharConstant(word):
position = st.add(word)
pif[word] = position
elif isIdentifier(word):
position=st.add(word)
pif[word] = position
else:
raise Exception("Lexical error. Invalid " + word + " on line "+ str(line_nr))
line = file.readline()
line_nr += 1
