Assignment3 is Added

submissions/abdalla210-ai/assignment3/catalog.py

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+# Abdullahi Omar Mohamed
+# Simple catalog program that loads, saves, and manages catalog items.
+
+from dataclasses import dataclass
+
+@dataclass
+class CatalogItem:
+    title: str
+    year: int
+
+    def __str__(self):
+        return f"{self.title} ({self.year})"
+
+
+class Catalog:
+    def __init__(self):
+        self.items = []
+
+    def add(self, item: CatalogItem):
+        self.items.append(item)
+
+    def list_all(self):
+        if not self.items:
+            print("No items in catalog.")
+            return
+        for item in self.items:
+            print(item)
+
+
+def load_catalog(path, catalog):
+    try:
+        with open(path, "r", encoding="utf-8") as file:
+            for line in file:
+                line = line.strip()
+                if not line:
+                    continue
+                parts = line.split("|")
+                if len(parts) != 2:
+                    continue
+                title, year_str = parts
+                try:
+                    year = int(year_str)
+                except ValueError:
+                    continue
+                catalog.add(CatalogItem(title, year))
+    except FileNotFoundError:
+        pass
+
+
+def save_catalog(path, catalog):
+    with open(path, "w", encoding="utf-8") as file:
+        for item in catalog.items:
+            file.write(f"{item.title}|{item.year}\n")
+
+
+def main():
+    path = "catalog.txt"
+    catalog = Catalog()
+    load_catalog(path, catalog)
+
+    while True:
+        print("\n1: Add")
+        print("2: List")
+        print("3: Save")
+        print("4: Quit")
+
+        choice = input("Enter choice: ")
+
+        if choice == "1":
+            title = input("Enter title: ")
+            year_str = input("Enter year: ")
+            try:
+                year = int(year_str)
+            except ValueError:
+                print("Invalid year.")
+                continue
+            catalog.add(CatalogItem(title, year))
+
+        elif choice == "2":
+            catalog.list_all()
+
+        elif choice == "3":
+            save_catalog(path, catalog)
+            print("Saved.")
+
+        elif choice == "4":
+            save_catalog(path, catalog)
+            print("Goodbye.")
+            break
+
+        else:
+            print("Invalid choice.")
+
+
+if __name__ == "__main__":
+    main()

submissions/abdalla210-ai/assignment3/catalog.txt

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+herro|2020