primetrydemo 0.1.0

A simple example package

1. Web Scraper with BeautifulSoup and Requests import requests from bs4 import BeautifulSoup

def fetch_article_titles(url): response = requests.get(url)

if response.status_code != 200:
    print(f"Failed to retrieve the page. Status code: {response.status_code}")
    return

soup = BeautifulSoup(response.text, 'html.parser')

titles = []
for article in soup.find_all('h2', class_='article-title'):
    titles.append(article.get_text(strip=True))

return titles

if name == "main": url = 'https://example.com/articles' titles = fetch_article_titles(url)

if titles:
    print("Article Titles:")
    for idx, title in enumerate(titles, 1):
        print(f"{idx}. {title}")

2.Machine Learning Model with Scikit-learn import numpy as np from sklearn.datasets import load_iris from sklearn.model_selection import train_test_split from sklearn.tree import DecisionTreeClassifier from sklearn.metrics import accuracy_score

Load dataset

iris = load_iris() X = iris.data y = iris.target

Split the dataset into training and testing sets

X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.3, random_state=42)

Create a decision tree classifier

clf = DecisionTreeClassifier()

Train the model

clf.fit(X_train, y_train)

Predict on test data

y_pred = clf.predict(X_test)

Evaluate the model

accuracy = accuracy_score(y_test, y_pred) print(f"Model Accuracy: {accuracy:.2f}")

3.A Complex Linked List Implementation class Node: def init(self, data): self.data = data self.prev = None self.next = None

class DoublyLinkedList: def init(self): self.head = None

def insert_at_end(self, data):
    new_node = Node(data)
    if not self.head:
        self.head = new_node
        return
    last_node = self.head
    while last_node.next:
        last_node = last_node.next
    last_node.next = new_node
    new_node.prev = last_node

def delete(self, key):
    temp = self.head
    if temp and temp.data == key:
        self.head = temp.next
        if self.head:
            self.head.prev = None
        temp = None
        return
    while temp and temp.data != key:
        temp = temp.next
    if temp is None:
        print("Node not found")
        return
    if temp.next:
        temp.next.prev = temp.prev
    if temp.prev:
        temp.prev.next = temp.next
    temp = None

def display(self):
    temp = self.head
    while temp:
        print(temp.data, end=" <-> ")
        temp = temp.next
    print("None")

if name == "main": dll = DoublyLinkedList() dll.insert_at_end(10) dll.insert_at_end(20) dll.insert_at_end(30)

print("Initial List:")
dll.display()

dll.delete(20)
print("List after deletion:")
dll.display()

4. Recursive Sudoku Solver def is_valid(board, row, col, num): for i in range(9): if board[row][i] == num or board[i][col] == num: return False start_row, start_col = 3 * (row // 3), 3 * (col // 3) for i in range(start_row, start_row + 3): for j in range(start_col, start_col + 3): if board[i][j] == num: return False return True

def solve_sudoku(board): for row in range(9): for col in range(9): if board[row][col] == 0: for num in range(1, 10): if is_valid(board, row, col, num): board[row][col] = num if solve_sudoku(board): return True board[row][col] = 0 return False return True

def print_board(board): for row in board: print(" ".join(str(num) for num in row))

if name == "main": puzzle = [ [5, 3, 0, 0, 7, 0, 0, 0, 0], [6, 0, 0, 1, 9, 5, 0, 0, 0], [0, 9, 8, 0, 0, 0, 0, 6, 0], [8, 0, 0, 0, 6, 0, 0, 0, 3], [4, 0, 0, 8, 0, 3, 0, 0, 1], [7, 0, 0, 0, 2, 0, 0, 0, 6], [0, 6, 0, 0, 0, 0, 2, 8, 0], [0, 0, 0, 4, 1, 9, 0, 0, 5], [0, 0, 0, 0, 8, 0, 0, 7, 9] ]

if solve_sudoku(puzzle):
    print("Solved Sudoku:")
    print_board(puzzle)
else:
    print("No solution found.")