diff --git a/.gitignore b/.gitignore
index 27f1fd8..796ac1e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 .ruff_cachetry init
 
 .idea/
+/venv/
+.DS_Store
diff --git a/README.md b/README.md
index f8e70ba..4691e76 100644
--- a/README.md
+++ b/README.md
@@ -1 +1 @@
-Learn project with Python examples and for homework
\ No newline at end of file
+# Python__Pro
\ No newline at end of file
diff --git a/book.json b/book.json
new file mode 100644
index 0000000..e8627ab
--- /dev/null
+++ b/book.json
@@ -0,0 +1,31 @@
+
+     [
+        {
+            "title": "Гамлет",
+            "author": "Вильям Шекспир",
+            "year": "1603"
+        },
+        {
+            "title":"Изучаем Python",
+            "author":"Эрик Мэтиз",
+            "year": "2020"
+        },
+        {
+            "title": "Ромэо и Джульетта",
+            "author": "Вильям Шекспир",
+            "year": "1597"
+        },
+        {
+            "title": "Nature",
+            "author": "Nature publishing group",
+            "year": "1869",
+            "edition": "10"
+        },
+        {
+            "title": "Medical",
+            "author": "World Helth Organization",
+            "year": "1948",
+            "edition": "1010"
+        }
+    ]
+
diff --git a/examples/__init__.py b/examples/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/examples/constants.py b/examples/constants.py
deleted file mode 100644
index 437b8eb..0000000
--- a/examples/constants.py
+++ /dev/null
@@ -1,5 +0,0 @@
-MOVIES = [
-    'Фільм 1: Шерлок Голмс',
-    'Фільм 2: Інцепція',
-    'Фільм 3: Матриця',
-]
diff --git a/examples/context_managers.py b/examples/context_managers.py
deleted file mode 100644
index 51f39a2..0000000
--- a/examples/context_managers.py
+++ /dev/null
@@ -1,55 +0,0 @@
-from contextlib import contextmanager
-
-
-@contextmanager
-def file_opener(filename, mode):
-    file = open(filename, mode)
-    yield file
-    file.close()
-
-
-class FileOpener:
-    def __init__(self, filename, mode):
-        self.filename = filename
-        self.mode = mode
-        self.file = None
-
-    def __enter__(self):
-        self.file = open(self.filename, self.mode)
-        return self.file
-
-    def __exit__(self, exc_type, exc_value, traceback):
-        self.file.close()
-
-
-def call_class_context_manager():
-    with FileOpener('class_cm.txt', 'w') as file:
-        file.write('Я був заповнений за допомогою классового контекстного менеджеру!')
-
-
-def call_func_context_manager():
-    with file_opener('func_cm.txt', 'w') as file:
-        file.write('Я був заповнений за допомогою функціонального контекстного менеджеру!')
-
-
-def call_try_finally_construction():
-    file = None
-    try:
-        file = open('try_finally.txt', 'w')
-        file.write('Я був заповнений за допомогою try/except/finally конструкцією!!')
-    except Exception as e:
-        print(f'Помилка: {e}')
-    finally:
-        if file:
-            file.close()
-
-
-if __name__ == '__main__':
-    print('call_class_context_manager')
-    call_class_context_manager()
-
-    print('call_func_context_manager')
-    call_func_context_manager()
-
-    print('call_try_finally_construction')
-    call_try_finally_construction()
diff --git a/examples/decorators.py b/examples/decorators.py
deleted file mode 100644
index 69cd5b4..0000000
--- a/examples/decorators.py
+++ /dev/null
@@ -1,51 +0,0 @@
-import time
-
-
-def timer(func):
-    def wrapper(*args, **kwargs):
-        start_time = time.perf_counter()
-        result = func(*args, **kwargs)
-        end_time = time.perf_counter()
-        elapsed_time = end_time - start_time
-        print(f"Функція '{func.__name__}' виконувалася {elapsed_time:.4f} секунд")
-        return result
-    return wrapper
-
-
-@timer
-def long_running_function(num):
-    for _ in range(num):
-        pass
-
-
-def run_decorated_func_without_args():
-    long_running_function(1000000)
-
-
-def logger(func):
-    def wrapper(*args, **kwargs):
-        result = func(*args, **kwargs)
-        with open('log.txt', 'a') as file:
-            file.write(
-                f"Функція '{func.__name__}' була викликана з аргументами {args} і ключовими словами {kwargs}."
-                f" Результат: {result}\n",
-            )
-        return result
-    return wrapper
-
-
-@logger
-def add(a, b):
-    return a + b
-
-
-def run_decorated_func_with_args():
-    add(2, 3)
-
-
-if __name__ == '__main__':
-    print('run_decorated_func_without_args')
-    run_decorated_func_without_args()
-
-    print('run_decorated_func_with_args()')
-    run_decorated_func_with_args()
diff --git a/examples/func_cm.txt b/examples/func_cm.txt
deleted file mode 100644
index 8c521e0..0000000
--- a/examples/func_cm.txt
+++ /dev/null
@@ -1 +0,0 @@
-Я був заповнений за допомогою функціонального контекстного менеджеру!
\ No newline at end of file
diff --git a/examples/generators.py b/examples/generators.py
deleted file mode 100644
index 6ea250b..0000000
--- a/examples/generators.py
+++ /dev/null
@@ -1,51 +0,0 @@
-from examples.constants import MOVIES
-
-
-def movie_generator():
-    for movie in MOVIES:
-        yield movie
-
-
-def via_for_loop():
-    for movie in movie_generator():
-        print(movie)
-
-
-def use_generator_expression():
-    movie_gen = (title for title in MOVIES)
-
-    for movie in movie_gen:
-        print(movie)
-
-
-def use_next():
-    movie_gen = (title for title in MOVIES)
-    print(next(movie_gen))  # Виведе "Фільм: Шерлок Голмс"
-
-
-def second_generator_usage():
-    movie_gen = (title for title in MOVIES)
-
-    # Використовуємо генератор вперше
-    for movie in movie_gen:
-        print(movie)
-
-    print('Спроба викликати генератор вдруге:')
-
-    # Спроба використовувати генератор вдруге
-    for movie in movie_gen:
-        print(movie)
-
-
-if __name__ == '__main__':
-    print('via_for_loop')
-    via_for_loop()
-
-    print('use_generator_expression')
-    use_generator_expression()
-
-    print('use_next')
-    use_next()
-
-    print('second_generator_usage')
-    second_generator_usage()
diff --git a/examples/iterators.py b/examples/iterators.py
deleted file mode 100644
index 2cd672f..0000000
--- a/examples/iterators.py
+++ /dev/null
@@ -1,59 +0,0 @@
-"""
-Ітератори в Python - це об'єкти, які реалізують два методи: __iter__() та __next__().
-Ітератори дозволяють ітерувати (або проходитися) по елементам колекції (наприклад, списку або словника) послідовно.
-"""
-from examples.constants import MOVIES
-
-
-class MovieCollection:
-    def __init__(self, movies_list: list[str] = MOVIES):
-        self.movies = movies_list
-
-    def __iter__(self):
-        self.current_movie = 0
-        return self
-
-    def __next__(self):
-        if self.current_movie >= len(self.movies):
-            raise StopIteration
-
-        movie = self.movies[self.current_movie]
-        self.current_movie += 1
-        return movie
-
-
-my_movies = MovieCollection()
-
-
-def iter_movies_with_function(movies: MovieCollection = my_movies):
-    movie_iterator = iter(movies)
-
-    print(next(movie_iterator))  # Фільм 1: Шерлок Голмс
-    print(next(movie_iterator))  # Фільм 2: Інцепція
-    print(next(movie_iterator))  # Фільм 3: Матриця
-
-    # Цей наступний виклик спричинить StopIteration, тому що всі фільми вже були перебрані.
-    print(next(movie_iterator))
-
-
-def iter_movies_with_magic_methods(movies: MovieCollection = my_movies):
-    movie_iterator = movies.__iter__()
-
-    print(movie_iterator.__next__())  # Фільм 1: Шерлок Голмс
-    print(movie_iterator.__next__())  # Фільм 2: Інцепція
-
-
-def iter_via_for_loop(movies: MovieCollection):
-    for movie in movies:
-        print(movie)
-
-
-if __name__ == '__main__':
-    print('iter_movies_with_function')
-    iter_movies_with_function()
-
-    print('iter_movies_with_magic_methods')
-    iter_movies_with_magic_methods()
-
-    print('iter_via_for_loop')
-    iter_via_for_loop(movies=MOVIES)
diff --git a/examples/log.txt b/examples/log.txt
deleted file mode 100644
index 34009a8..0000000
--- a/examples/log.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-Функція 'add' була викликана з аргументами (2, 3) і ключовими словами {}. Результат: 5
-Функція 'add' була викликана з аргументами (2, 3) і ключовими словами {}. Результат: 5
-Функція 'add' була викликана з аргументами (4, 7) і ключовими словами {}. Результат: 11
-Функція 'add' була викликана з аргументами (4, 7) і ключовими словами {}. Результат: 11
-Функція 'add' була викликана з аргументами (0, 0) і ключовими словами {}. Результат: 0
-Функція 'add' була викликана з аргументами (0, 0) і ключовими словами {}. Результат: 0
-Функція 'add' була викликана з аргументами (0, 0) і ключовими словами {}. Результат: 0
-Функція 'add' була викликана з аргументами (0, 0) і ключовими словами {}. Результат: 0
diff --git a/examples/main.py b/examples/main.py
deleted file mode 100644
index 94e3a87..0000000
--- a/examples/main.py
+++ /dev/null
@@ -1,16 +0,0 @@
-# This is a sample Python script.
-
-# Press ⌃R to execute it or replace it with your code.
-# Press Double ⇧ to search everywhere for classes, files, tool windows, actions, and settings.
-
-
-def print_hi(name):
-    # Use a breakpoint in the code line below to debug your script.
-    print(f'Hi, {name}')  # Press ⌘F8 to toggle the breakpoint.
-
-
-# Press the green button in the gutter to run the script.
-if __name__ == '__main__':
-    print_hi('PyCharm')
-
-# See PyCharm help at https://www.jetbrains.com/help/pycharm/
diff --git a/examples/oop.py b/examples/oop.py
deleted file mode 100644
index c54354f..0000000
--- a/examples/oop.py
+++ /dev/null
@@ -1,65 +0,0 @@
-from abc import ABC, abstractmethod
-
-
-#  Абстракція
-class AbstractPiglet(ABC):
-    def __init__(self, name: str):
-        self.name = name
-
-    @abstractmethod
-    def build_house(self):
-        raise NotImplementedError
-
-    @property
-    @abstractmethod
-    def house_material(self):
-        raise NotImplementedError
-
-
-class Piglet(AbstractPiglet):
-    def __init__(self, name, material: str = 'солома'):
-        super().__init__(name)
-        self.__house_material = material  # Інкапсуляція
-        self._strategy = 'Врятуватися від вовка.'
-
-    @property
-    def house_material(self):
-        return self.__house_material
-
-    def print_strategy(self):
-        print(self._strategy)
-
-    def build_house(self):
-        print(f'{self.name} побудував будинок з {self.house_material}!')
-
-
-#  Наслідування
-class ImprovedPiglet(Piglet):
-    def __init__(self, name: str, material: str = 'цегла'):
-        super().__init__(name=name, material=material)
-
-
-class Wolf:
-    def __init__(self, name: str = 'Вова'):
-        self.name = name
-
-    def huff_and_puff(self, piglet: AbstractPiglet):
-        if piglet.house_material == 'солома':
-            print(f'Вовк {self.name} він здув будинок!')
-        else:
-            print(f'Вовк {self.name} не зміг здути будинок.')
-
-
-if __name__ == '__main__':
-    first_piglet = Piglet(name='Хрю')
-    first_piglet.build_house()
-    first_piglet.print_strategy()
-
-    second_piglet = ImprovedPiglet(name='Хря')
-    second_piglet.build_house()
-    second_piglet.print_strategy()
-
-    big_bad_wolf = Wolf()
-    #  Поліморфізм
-    big_bad_wolf.huff_and_puff(piglet=first_piglet)
-    big_bad_wolf.huff_and_puff(piglet=second_piglet)
diff --git a/examples/pydantics.py b/examples/pydantics.py
deleted file mode 100644
index 67ed19a..0000000
--- a/examples/pydantics.py
+++ /dev/null
@@ -1,58 +0,0 @@
-from datetime import (
-    date,
-    datetime,
-)
-
-from dateutil.relativedelta import relativedelta
-from pydantic import (
-    BaseModel,
-    EmailStr,
-    computed_field,
-    field_validator,
-)
-
-
-class User(BaseModel):
-    first_name: str
-    last_name: str
-    birth_date: date
-    email: EmailStr
-
-    @computed_field
-    @property
-    def age(self) -> int:
-        return relativedelta(datetime.now(), self.birth_date).years
-
-    @field_validator('email')
-    def validate_domain_zone(cls, value):
-        if '.ru' in value:
-            raise ValueError('We do not accept ru domains!')
-
-        return value
-
-
-if __name__ == '__main__':
-    # Створення інстансу моделі за допомогою іменованих аргументів
-    user1 = User(
-        first_name='Іван',
-        last_name='Петрович',
-        birth_date='1990-01-15',
-        email='ivan.petrovich@example.com',
-    )
-
-    # Створення інстансу моделі передавши словником
-    attrs = {
-        'first_name': 'Олена',
-        'last_name': 'Сергіївна',
-        'birth_date': '1985-05-20',
-        'email': 'olena.sergiivna@example.com',
-    }
-
-    user2 = User(**attrs)
-
-    # Вивести модель у вигляді словника і як JSON
-    print(user1.model_dump())
-    print(user1.model_dump_json())
-
-    print(user2.model_dump())
-    print(user2.model_dump_json())
diff --git a/examples/solid.py b/examples/solid.py
deleted file mode 100644
index 6f67826..0000000
--- a/examples/solid.py
+++ /dev/null
@@ -1,116 +0,0 @@
-from abc import ABC, abstractmethod
-from typing import List
-
-
-# Single Responsibility Principle
-class Engine:
-    def start(self) -> str:
-        return 'Двигун стартував'
-
-    def stop(self) -> str:
-        return 'Двигун зупинився'
-
-
-class Radio:
-    def turn_on(self) -> str:
-        return 'Радіо включено'
-
-    def turn_off(self) -> str:
-        return 'Радіо виключено'
-
-
-# Open/Closed Principle
-class BaseSensor(ABC):
-    @abstractmethod
-    def read_data(self) -> str:
-        pass
-
-
-class TemperatureSensor(BaseSensor):
-    def read_data(self) -> str:
-        return 'Дані температурного датчика'
-
-
-# Liskov Substitution Principle
-class Bird:
-    def move(self) -> str:
-        return 'Птах літає'
-
-
-class Ostrich(Bird):
-    def move(self) -> str:
-        return 'Страус біжить'
-
-
-# Interface Segregation Principle
-class Worker(ABC):
-    @abstractmethod
-    def work(self) -> str:
-        pass
-
-
-class Musician(Worker):
-    def work(self) -> str:
-        return 'Музикант грає на інструменті'
-
-
-class Builder(Worker):
-    def work(self) -> str:
-        return 'Будівельник будує будівлю'
-
-
-# Dependency Inversion Principle
-class LightBulb(ABC):
-    @abstractmethod
-    def turn_on(self) -> str:
-        pass
-
-    @abstractmethod
-    def turn_off(self) -> str:
-        pass
-
-
-class IncandescentBulb(LightBulb):
-    def turn_on(self) -> str:
-        return 'Лампочка розжарюється'
-
-    def turn_off(self) -> str:
-        return 'Лампочка гасне'
-
-
-class Switch:
-    def __init__(self, bulb: LightBulb):
-        self.bulb = bulb
-
-    def operate(self) -> str:
-        return self.bulb.turn_on() + '\n' + self.bulb.turn_off()
-
-
-if __name__ == '__main__':
-    # Single Responsibility Principle
-    engine = Engine()
-    print(engine.start())
-    radio = Radio()
-    print(radio.turn_on())
-
-    # Open/Closed Principle
-    sensors: List[BaseSensor] = [TemperatureSensor()]
-    for sensor in sensors:
-        print(sensor.read_data())
-
-    # Liskov Substitution Principle
-    bird = Bird()
-    print(bird.move())
-    ostrich = Ostrich()
-    print(ostrich.move())
-
-    # Interface Segregation Principle
-    musician = Musician()
-    print(musician.work())
-    builder = Builder()
-    print(builder.work())
-
-    # Dependency Inversion Principle
-    bulb = IncandescentBulb()
-    switch = Switch(bulb=bulb)
-    print(switch.operate())
diff --git a/examples/try_finally.txt b/examples/try_finally.txt
deleted file mode 100644
index 458e2fe..0000000
--- a/examples/try_finally.txt
+++ /dev/null
@@ -1 +0,0 @@
-Я був заповнений за допомогою try/except/finally конструкцією!!
\ No newline at end of file
diff --git a/lesson_2.py b/lesson_2.py
new file mode 100644
index 0000000..a5944ef
--- /dev/null
+++ b/lesson_2.py
@@ -0,0 +1,136 @@
+from typing import List
+from pydantic import BaseModel
+import logging
+import json
+
+
+class BookModel(BaseModel):
+    title: str
+    author: str
+    year: int
+
+
+class AbstractLibraryItem(BaseModel):
+    def item_info(self):
+        raise NotImplementedError
+
+
+class Book(BookModel, AbstractLibraryItem):
+    def item_info(self):
+        return f"Книга '{self.title}' автора {self.author}, год издания {self.year}"
+
+
+class Journal(BaseModel):
+    title: str
+    author: str
+    year: int
+    edition: int
+
+    def item_info(self):
+        return f"Журнал '{self.title}' автора {self.author}, год издания {self.year}, номер издания {self.edition}"
+
+
+class Library:
+    def __init__(self):
+        self.__books: List[AbstractLibraryItem] = []
+
+    def __iter__(self):
+        return iter(self.__books)
+
+    def book_author(self, author: str):
+        return [book for book in self.__books if isinstance(book, Book) and book.author.lower() == author.lower()]
+
+    @staticmethod
+    def log_add_book(func):
+        def wrapper(self, item: AbstractLibraryItem):
+            logging.info(f"Добавлено в библиотеку: {item.item_info()}")
+            return func(self, item)
+
+        return wrapper
+
+    @staticmethod
+    def check_book_exists(func):
+        def wrapper(self, title: str):
+            if any(isinstance(book, Book) and book.title.lower() == title.lower() for book in self.__books):
+                return func(self, title)
+            else:
+                logging.error(f"Книга '{title}' не найдена в библиотеке.")
+
+        return wrapper
+
+    @log_add_book
+    def add_book(self, item: AbstractLibraryItem):
+        self.__books.append(item)
+
+    @check_book_exists
+    def remove_book(self, title: str):
+        self.__books = [book for book in self.__books if
+                        not (isinstance(book, Book) and book.title.lower() == title.lower())]
+
+    def save_books(self, filename: str = 'my_file.txt'):
+        unique_books = set()
+        unique_journals = set()
+
+        with open(filename, 'w') as file:
+            for item in self.__books:
+                if isinstance(item, Book):
+                    book_tuple = (item.title, item.author, item.year)
+                    if book_tuple not in unique_books:
+                        unique_books.add(book_tuple)
+                        file.write(f"Книга: {item.title}, Автор: {item.author}, Год издания: {item.year}\n")
+                elif isinstance(item, Journal):
+                    journal_tuple = (item.title, item.author, item.year, item.edition)
+                    if journal_tuple not in unique_journals:
+                        unique_journals.add(journal_tuple)
+                        file.write(
+                            f"Журнал: {item.title}, Автор: {item.author}, Год издания: {item.year}, Номер издания: {item.edition}\n")
+
+    def load_books_from_file(self, filename: str = 'book.json'):
+        with open(filename, 'r') as file:
+            books_data = json.load(file)
+            for book_data in books_data:
+                if 'edition' in book_data:
+                    journal = Journal(**book_data)
+                    self.add_book(journal)
+                else:
+                    book = Book(**book_data)
+                    self.add_book(book)
+
+
+if __name__ == "__main__":
+    logging.basicConfig(level=logging.INFO)
+
+    my_library = Library()
+
+    my_library.load_books_from_file()
+
+    books_in_library = list(my_library)
+    if books_in_library:
+        print("Список книг в библиотеке:")
+        for item in books_in_library:
+            print(item.item_info())
+
+    author = "Вильям Шекспир"
+    book_author = my_library.book_author(author)
+    if book_author:
+        print(f"\nКниги автора '{author}':")
+        for book in book_author:
+            print(book.item_info())
+
+    title_to_remove = "Гамлет"
+    my_library.remove_book(title_to_remove)
+    books_after_removal = list(my_library)
+    if books_after_removal:
+        print("\nУдалена книга:", {title_to_remove})
+        print("Список книг после удаления:")
+        for item in books_after_removal:
+            print(item.item_info())
+
+    my_library.load_books_from_file('book.json')
+    books_after_addition = list(my_library)
+    if books_after_addition:
+        print("\nСписок книг в библиотеке после добавления:")
+        for item in books_after_addition:
+            print(item.item_info())
+
+    my_library.save_books('my_file.txt')
diff --git a/main.py b/main.py
deleted file mode 100644
index 94e3a87..0000000
--- a/main.py
+++ /dev/null
@@ -1,16 +0,0 @@
-# This is a sample Python script.
-
-# Press ⌃R to execute it or replace it with your code.
-# Press Double ⇧ to search everywhere for classes, files, tool windows, actions, and settings.
-
-
-def print_hi(name):
-    # Use a breakpoint in the code line below to debug your script.
-    print(f'Hi, {name}')  # Press ⌘F8 to toggle the breakpoint.
-
-
-# Press the green button in the gutter to run the script.
-if __name__ == '__main__':
-    print_hi('PyCharm')
-
-# See PyCharm help at https://www.jetbrains.com/help/pycharm/
diff --git a/my_file.txt b/my_file.txt
new file mode 100644
index 0000000..0ad7033
--- /dev/null
+++ b/my_file.txt
@@ -0,0 +1,5 @@
+Книга: Изучаем Python, Автор: Эрик Мэтиз, Год издания: 2020
+Книга: Ромэо и Джульетта, Автор: Вильям Шекспир, Год издания: 1597
+Журнал: Nature, Автор: Nature publishing group, Год издания: 1869, Номер издания: 10
+Журнал: Medical, Автор: World Helth Organization, Год издания: 1948, Номер издания: 1010
+Книга: Гамлет, Автор: Вильям Шекспир, Год издания: 1603
diff --git a/poetry.lock b/poetry.lock
index 7142b2a..b237b9a 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -375,4 +375,4 @@ files = [
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.11"
-content-hash = "2c7156bdfce01ec2335e79c1049d72601609909d2da6bdfed12647b7eb6332f2"
+content-hash = "2c7156bdfce01ec2335e79c1049d72601609909d2da6bdfed12647b7eb6332f2"
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..47bb487
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,9 @@
+blinker==1.7.0
+click==8.1.7
+Flask==3.0.2
+itsdangerous==2.1.2
+Jinja2==3.1.3
+MarkupSafe==2.1.5
+Werkzeug==3.0.1
+
+pydantic~=2.6.4
\ No newline at end of file