256 lines
9.2 KiB
Python
256 lines
9.2 KiB
Python
import time
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from pathlib import Path
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import random
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import csv
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import sys
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import pandas as pd
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import matplotlib.pyplot as plt
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import seaborn as sns
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sys.setrecursionlimit(12000)
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#Связный список
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def ll_insert(head, name, phone):
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current = head
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while current:
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if current['name'] == name:
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current['phone'] = phone
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return head
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current = current['next']
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new_node = {'name': name, 'phone': phone, 'next': None}
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new_node['next'] = head
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return new_node
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def ll_find(head, name):
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current = head
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while current:
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if current['name'] == name:
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return current['phone']
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current = current['next']
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return None
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def ll_delete(head, name):
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if head['name'] == name:
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return head['next']
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current = head
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while current['next']:
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if current['next']['name'] == name:
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current['next'] = current['next']['next']
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break
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current = current['next']
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return head
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def ll_list_all(head):
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data= []
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current = head
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while current:
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data.append((current['name'], current['phone']))
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current = current['next']
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return sorted(data)
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#хэш-таблица
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def ht_insert(buckets, name, phone):
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id=hash(name)%len(buckets)
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buckets[id] = ll_insert(buckets[id], name, phone)
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def ht_find(buckets, name):
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id= hash(name)%len(buckets)
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return ll_find(buckets[id], name)
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def ht_delete(buckets, name):
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id= hash(name)%len(buckets)
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buckets[id] = ll_delete(buckets[id], name)
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def ht_list_all(buckets):
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data = []
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for head in buckets:
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current = head
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while current:
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data.append((current['name'], current['phone']))
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current = current['next']
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return sorted(data)
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#Двоичное дерево поиска
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def bst_insert(root, name, phone):
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if root is None:
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return {'name': name, 'phone': phone, 'left': None, 'right': None}
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if name == root['name']:
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root['phone'] = phone
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elif name < root['name']:
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root['left'] = bst_insert(root['left'], name, phone)
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else:
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root['right'] = bst_insert(root['right'], name, phone)
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return root
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def bst_find(root, name):
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if root is None:
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return None
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if root['name'] == name:
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return root['phone']
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elif name<root['name']:
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return bst_find(root['left'], name)
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else:
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return bst_find(root['right'], name)
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def minimum(node):
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current = node
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while current['left'] is not None:
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current = current['left']
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return current
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def bst_delete(root, name):
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if root is None:
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return None
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if name < root['name']:
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root['left'] = bst_delete(root['left'], name)
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elif name > root['name']:
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root['right'] = bst_delete(root['right'], name)
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else:
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if root['left'] is None:
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return root['right']
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elif root['right'] is None:
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return root['left']
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min=minimum(root['right'])
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root['name']=min['name']
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root['phone']=min['phone']
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root['right']=bst_delete(root['right'], min['name'])
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return root
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def bst_list_all(root):
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result=[]
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if root:
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result.extend(bst_list_all(root['left']))
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result.append((root['name'], root['phone']))
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result.extend(bst_list_all(root['right']))
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return result
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#1. Генерация тестовых данных
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def generate(n=10000):
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records = [(f"User_{i:05d}", f"+7 ({random.randint(100, 999)}) {random.randint(100, 999)}-{random.randint(00, 99):02}-{random.randint(00, 99):02}") for i in range(n)]
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records_sorted =records.copy()
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records_shuffled=records.copy()
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random.shuffle(records_shuffled)
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return records_sorted, records_shuffled
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#3.Проведение замеров
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#А. Вставка всех записей
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def task_A(structure_name, data):
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start =time.perf_counter()
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if structure_name=="LinkedList":
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head=None
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for name, phone in data:
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head = ll_insert(head, name, phone)
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container=head
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elif structure_name=="HashTable":
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buckets=[None]*1000
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for name, phone in data:
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ht_insert(buckets, name, phone)
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container=buckets
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elif structure_name=="BinarySearchTree":
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root=None
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for name, phone in data:
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root = bst_insert(root, name, phone)
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container=root
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end = time.perf_counter()
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elapsed = end - start
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return elapsed, container
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#Б. Поиск 100 случайных записей
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def task_B(structure_name,container, data):
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start=time.perf_counter()
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if structure_name=="LinkedList":
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for name in data:
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ll_find(container, name)
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elif structure_name=="HashTable":
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for name in data:
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ht_find(container, name)
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elif structure_name=="BinarySearchTree":
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for name in data:
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bst_find(container, name)
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end=time.perf_counter()
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elapsed = end - start
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return elapsed
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#В. Удаление 50 случайных чисел
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def task_C(structure_name,container, data):
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start=time.perf_counter()
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if structure_name=="LinkedList":
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for name in data:
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container=ll_delete(container, name)
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elif structure_name=="HashTable":
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for name in data:
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ht_delete(container, name)
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elif structure_name=="BinarySearchTree":
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for name in data:
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container = bst_delete(container, name)
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end=time.perf_counter()
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elapsed = end - start
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return elapsed
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results=[["Структура", "Режим", "Операция", "Время (сек)"]]
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structures_name=["LinkedList", "HashTable", "BinarySearchTree"]
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experiment_name=["Вставка", "Поиск", "Удаление"]
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mode_of_data=["Случайный", "Отсортированный"]
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records_sorted, records_shuffled = generate()
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container_shuffled=[]#хранилище структур со случайными данными
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container_sorted=[]#хранилище структур с отсортированными данными
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names=[record[0] for record in records_shuffled]
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#Данные для задания Б
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random_names=random.sample(names, 100)
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missing_names=[f"None_{i}" for i in range(10)]
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names_for_test=random_names+missing_names
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#Данные для задания В
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names_to_delete=random.sample(names,50)
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for i in range(3):
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container_shuffled.append(task_A(structures_name[i], records_shuffled)[1])
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container_sorted.append(task_A(structures_name[i], records_sorted)[1])
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for j in range(5):
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# Реализация задания А
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result_shuffled = task_A(structures_name[i], records_shuffled)[0]
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results.append([structures_name[i], mode_of_data[0], experiment_name[0], result_shuffled])
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result_sorted= task_A(structures_name[i], records_sorted)[0]
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results.append([structures_name[i], mode_of_data[1], experiment_name[0], result_sorted])
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print(f"{structures_name[i]}: Время вставки всех записей {mode_of_data[0]}: {result_shuffled} {mode_of_data[1]}: {result_sorted}")
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# Реализация задания Б
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result_shuffled = task_B(structures_name[i], container_shuffled[i], names_for_test)
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results.append([structures_name[i], mode_of_data[0], experiment_name[1], result_shuffled])
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result_sorted = task_B(structures_name[i], container_sorted[i], names_for_test)
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results.append([structures_name[i], mode_of_data[1], experiment_name[1], result_sorted])
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print(f"{structures_name[i]}: Время нахождения 110 записей для {mode_of_data[0]}: {result_shuffled} {mode_of_data[1]}: {result_sorted} ")
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#Реализация задания В
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shuffled = container_shuffled[i]
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sorted = container_sorted[i]
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result_shuffled = task_C(structures_name[i], shuffled, names_to_delete)
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results.append([structures_name[i], mode_of_data[0], experiment_name[2], result_shuffled])
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result_sorted = task_C(structures_name[i], sorted, names_to_delete)
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results.append([structures_name[i], mode_of_data[1], experiment_name[2], result_sorted])
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print(f"{structures_name[i]}: Время удаления 50 записей для {mode_of_data[0]}: {result_shuffled} {mode_of_data[1]}: {result_sorted}")
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#4. Сохранение результатов\
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current_dir=Path.cwd()
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target=current_dir.parent/"docs"/"data"
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csv_file=target /"results.csv"
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with open(csv_file, "w", newline="",encoding="utf-8-sig") as f:
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writer = csv.writer(f)
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writer.writerows(results)
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#Построение графиков
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df = pd.read_csv(csv_file)
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df_avg = df.groupby(["Структура", "Режим", "Операция"])["Время (сек)"].mean().reset_index()
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fig, axes = plt.subplots(1, 3, figsize=(18, 6), sharey=True)
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for i, experiment in enumerate(experiment_name):
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data_experiment = df_avg[df_avg["Операция"] == experiment]
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sns.barplot(ax=axes[i],data=data_experiment, x="Структура",y="Время (сек)",hue="Режим")
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axes[i].set_title(experiment)
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axes[i].set_ylabel("Среднее время (сек)")
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axes[i].set_yscale("log")
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plt.tight_layout()
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png_file= target/"graphics.png"
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plt.savefig(png_file, dpi=300, bbox_inches='tight')
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plt.show() |