set up poetry and pyenv

.gitignore

@@ -1,3 +1,45 @@
-.ruff_cachetry init
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
 
+# C extensions
+*.so
+
+# Distribution / packaging
+*.egg
+*.egg-info/
+dist/
+build/
+.eggs/
+
+# Virtual environment
+venv/
+env/
+.venv/
+.env/
+
+# PyCharm
 .idea/
+
+# VS Code
+.vscode/
+
+# Pytest
+.pytest_cache/
+
+# Jupyter Notebook
+.ipynb_checkpoints/
+
+# Logs and coverage
+*.log
+.coverage
+htmlcov/
+.tox/
+nosetests.xml
+coverage.xml
+*.cover
+
+# System files
+.DS_Store
+Thumbs.db

README.md

@@ -1 +1,12 @@
-Learn project with Python examples and for homework
+# lib-management-sys
+## Result of script execution:
++ creating a library
++ creating an instance of a book and a magazine
++ adding them to the library
++ displaying a list of books in the library
++ displaying a list of library books by author name
++ saving the list of books to a file
++ deleting a book from the library
++ displaying a list of books after deletion
++ adding books from a file to the library
++ displaying a list of library books after addition.

main.py

@@ -1,16 +1,176 @@
-# This is a sample Python script.
+from pydantic import BaseModel
+from abc import ABC, abstractmethod
 
-# Press ⌃R to execute it or replace it with your code.
-# Press Double ⇧ to search everywhere for classes, files, tool windows, actions, and settings.
+class BookModel(BaseModel):
+    title: str
+    author: str
+    year: int
 
+class MagazineModel(BaseModel):
+    name: str
+    number: int
+    month: str
+    year: int
 
-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.
+class Publication(ABC):
+    @abstractmethod
+    def show_author(self):
+        pass
 
+class Book(Publication):
+    def __init__(self, model: BookModel):
+        self.__model = model
 
-# Press the green button in the gutter to run the script.
-if __name__ == '__main__':
-    print_hi('PyCharm')
+    def __str__(self):
+        return f"{self.__model.title} by {self.__model.author} in {self.__model.year}"
 
-# See PyCharm help at https://www.jetbrains.com/help/pycharm/
+    def show_author(self) -> str:
+        return self.__model.author
+
+class Magazine(Publication):
+    def __init__(self, model: MagazineModel):
+        self.__model = model
+
+    def __str__(self):
+        return f"{self.__model.name} #{self.__model.number} / {self.__model.month} in {self.__model.year}"
+
+    def show_author(self) -> str:
+        return self.__model.name
+
+class Library:
+    def __init__(self, book_list: list[Book]):
+        self.books = book_list
+        self.current_book = 0
+
+    def __iter__(self):
+        self.current_book = 0
+
+        return self
+
+    def __next__(self):
+        if self.current_book >= len(self.books):
+            raise StopIteration
+
+        b = self.books[self.current_book]
+        self.current_book += 1
+
+        return b
+
+    def book_generator(self, author):
+        for b in self.books:
+            if b.show_author() == author:
+                yield b
+
+    def add_book(self, b: Book):
+        self.books.append(b)
+
+    def remove_book(self, b: Book):
+        self.books.remove(b)
+
+    def save_to_file(self, filename: str):
+        with open(filename, "w", encoding="utf-8") as f:
+            for book in self.books:
+                f.write(str(book) + "\n")
+
+    @staticmethod
+    def load_from_file(filename: str):
+        books = []
+        with open(filename, "r", encoding="utf-8") as f:
+            for line in f:
+                line = line.strip()
+                if " by " in line and " in " in line:
+                    try:
+                        title_part, rest = line.split(" by ", 1)
+                        author_part, year_part = rest.rsplit(" in ", 1)
+
+                        title = title_part.strip()
+                        author = author_part.strip()
+                        year = int(year_part.strip())
+                        model = BookModel(title=title, author=author, year=year)
+                        books.append(Book(model))
+                    except ValueError:
+                        print(f"Failed to parse line: {line}")
+                elif " #" in line and " / " and " in " in line:
+                    try:
+                        name_part, rest = line.split(" #", 1)
+                        number_part, rest = rest.split(" / ", 1)
+                        month_part, year_part = rest.rsplit(" in ", 1)
+
+                        name = name_part.strip()
+                        number = int(number_part.strip())
+                        month = month_part.strip()
+                        year = int(year_part.strip())
+
+                        model = MagazineModel(name=name, number=number, month=month, year=year)
+                        books.append(Magazine(model))
+                    except ValueError:
+                        print(f"Failed to parse line: {line}")
+                else:
+                    print(f"Invalid format: {line}")
+        return books
+
+def add_book_generator(func):
+    def wrapper(book, library, *args, **kwargs):
+        print(f"Adding book...")
+        result = func(book, library, *args, **kwargs)
+        print(f"Book {book} added to library")
+        print("[BOOKS IN LIBRARY]")
+        for b in library.books:
+            print(b)
+
+        return result
+    return wrapper
+
+@add_book_generator
+def add_book_library(book: Book, library: Library):
+    library.add_book(book)
+
+def remove_book_generator(func):
+    def wrapper(book, library, *args, **kwargs):
+        if book not in library.books:
+            print(f"Book {book} not found in library!")
+
+            return None
+
+        print(f"Removing book...")
+        result = func(book, library, *args, **kwargs)
+        print(f"Book removed from library")
+        print("[BOOKS IN LIBRARY]")
+        for b in library.books:
+            print(b)
+
+        return result
+    return wrapper
+
+@remove_book_generator
+def remove_book_library(book, library):
+    library.remove_book(book)
+
+book1 = Book(BookModel(title="Ubik", author="Philip K. Dick", year=1966))
+book2 = Book(BookModel(title="The Man in the High Castle", author="Philip K. Dick", year=1962))
+book3 = Book(BookModel(title="The colour of magic", author="Terry Pratchett", year=1983))
+book4 = Book(BookModel(title="Mort", author="Terry Pratchett", year=1987))
+
+magazine1 = Magazine(MagazineModel(name="Nintendo Power", number=13, month="January", year=1989))
+magazine2 = Magazine(MagazineModel(name="Pepper", number=21, month="June", year=1995))
+
+myBooks = Library([book1, book2, book3, magazine1, magazine2])
+
+print(next(myBooks))
+print(next(myBooks))
+print(next(myBooks))
+
+print("\n[ADD BOOKS TO LIBRARY]")
+add_book_library(book4, myBooks)
+
+print(next(myBooks))
+
+remove_book_library(book1, myBooks)
+
+myBooks.save_to_file("log.txt")
+
+print("\n[LOAD FROM FILE]")
+r = myBooks.load_from_file("log.txt")
+
+for book in r:
+    print(book.show_author())