Add: ej1 and started ej2

ejercicios/ej2/src/db.py

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+import sqlite3
+from pathlib import Path
+
+class DBManager:
+    def __init__(self, path):
+        self.conn = sqlite3.connect(path)
+        
+    def init(self):
+        try:
+            with self.conn:
+                self.conn.execute(
+                    """
+                    CREATE TABLE IF NOT EXISTS books (
+                        isbn INTEGER PRIMARY KEY,
+                        title TEXT,
+                        author TEXT,
+                        year DATE,
+                        publisher TEXT
+                    );
+                    """
+                )
+        except Exception as e:
+            print("Error creating table:", e)
+        
+    def insert(self, item):
+        try:
+            with self.conn:
+                self.conn.execute(
+                    """
+                    INSERT INTO books (isbn, title, author, year, publisher)
+                    VALUES (?, ?, ?, ?, ?);
+                    """,
+                    (item.isbn, item.title, item.author, item.year, item.publisher)
+                )
+        except Exception as e:
+            print("Error inserting book:", e)
+            
+    def close(self):
+        self.conn.close()

ejercicios/ej2/src/files.py

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+import csv
+from collections import namedtuple
+
+nt = namedtuple("Book", ["isbn", "title", "author", "year", "publisher"])
+
+def read_file(file):
+    with open(file, encoding="utf-8") as f:
+        reader = csv.reader(f, delimiter=";")
+        next(reader)
+        return [nt(r[0], r[1], r[2], r[3], r[4]) for r in reader] 

ejercicios/ej2/src/main.py

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+from files import read_file
+from db import DBManager
+from pathlib import Path
+
+DATA = Path(__file__).parent.parent / "data"
+
+def main():
+    dbm = DBManager(DATA / "books.bd")
+    dbm.init()
+    
+    file_path =  DATA / "books.csv"
+    for book in read_file(file_path):
+        dbm.insert(book)
+    
+if __name__ == "__main__":
+    main()