Finished: basic exercises. Started: BS4 exercise 1.

ejercicios/beautifulsoup/ej1/src/__ssl.py

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+def init_ssl():
+    import os, ssl
+    if (not os.environ.get('PYTHONHTTPSVERIFY', '') and
+    getattr(ssl, '_create_unverified_context', None)):
+        ssl._create_default_https_context = ssl._create_unverified_context

ejercicios/beautifulsoup/ej1/src/config.py

@@ -0,0 +1,6 @@
+from pathlib import Path
+
+URL = "https://www.vinissimus.com/es/vinos/tinto/?cursor=0"
+DATA_DIR = Path(__file__).parent.parent / "data"
+CSV_PATH =  DATA_DIR / "books.csv"
+DB_PATH = DATA_DIR / "books.bd"

ejercicios/beautifulsoup/ej1/src/db.py

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+import sqlite3
+from pathlib import Path
+
+
+class DBAttr:
+    def __init__(self, name, type_, modifier=""):
+        self.name = name
+        self.type_ = type_
+        self.modifier = modifier
+
+    def sql(self):
+        parts = [self.name, self.type_]
+        if self.modifier:
+            parts.append(self.modifier)
+        return " ".join(parts)
+
+
+class DBManager:
+    _instance = None
+    
+    def __new__(cls, *args, **kwargs):
+        if cls._instance is None:
+            cls._instance = super().__new__(cls)
+        return cls._instance
+    
+    def __init__(self, path):
+        self.path = Path(path)
+        self.conn = sqlite3.connect(self.path)
+        self.conn.row_factory = sqlite3.Row
+
+    def create_table(self, table_name, attributes: list[DBAttr]):
+        columns_sql = ",\n    ".join(attr.sql() for attr in attributes)
+
+        query = f"""
+        CREATE TABLE IF NOT EXISTS {table_name} (
+            {columns_sql}
+        );
+        """
+
+        try:
+            with self.conn:
+                self.conn.execute(query)
+        except Exception as e:
+            print("Error creating table:", e)
+
+    def get_all(self, table_name):
+        try:
+            cursor = self.conn.execute(f"SELECT * FROM {table_name};")
+            return [dict(row) for row in cursor.fetchall()]
+        except Exception as e:
+            print("Error selecting:", e)
+            return []
+
+    def get_by(self, table_name, column, value):
+        try:
+            query = f"SELECT * FROM {table_name} WHERE {column} = ?;"
+            cursor = self.conn.execute(query, (value,))
+            return [dict(row) for row in cursor.fetchall()]
+        except Exception as e:
+            print("Error selecting:", e)
+            return []
+
+    def insert(self, table_name, data: dict):
+        keys = ", ".join(data.keys())
+        placeholders = ", ".join("?" for _ in data)
+        values = tuple(data.values())
+
+        query = f"""
+        INSERT INTO {table_name} ({keys})
+        VALUES ({placeholders});
+        """
+
+        try:
+            with self.conn:
+                self.conn.execute(query, values)
+        except Exception as e:
+            print("Error inserting:", e)
+
+    def update(self, table_name, data: dict, where_column, where_value):
+        set_clause = ", ".join(f"{key} = ?" for key in data.keys())
+        values = list(data.values())
+        values.append(where_value)
+
+        query = f"""
+        UPDATE {table_name}
+        SET {set_clause}
+        WHERE {where_column} = ?;
+        """
+
+        try:
+            with self.conn:
+                self.conn.execute(query, tuple(values))
+        except Exception as e:
+            print("Error updating:", e)
+
+    def delete(self, table_name, where_column, where_value):
+        query = f"DELETE FROM {table_name} WHERE {where_column} = ?;"
+
+        try:
+            with self.conn:
+                self.conn.execute(query, (where_value,))
+        except Exception as e:
+            print("Error deleting:", e)
+
+    def exists(self, table_name, where_column, where_value):
+        query = f"SELECT 1 FROM {table_name} WHERE {where_column} = ? LIMIT 1;"
+
+        try:
+            cursor = self.conn.execute(query, (where_value,))
+            return cursor.fetchone() is not None
+        except Exception as e:
+            print("Error checking existence:", e)
+            return False
+
+    def count(self, table_name):
+        try:
+            cursor = self.conn.execute(f"SELECT COUNT(*) as total FROM {table_name};")
+            return cursor.fetchone()["total"]
+        except Exception as e:
+            print("Error counting:", e)
+            return 0
+
+    def close(self):
+        self.conn.close()

ejercicios/beautifulsoup/ej1/src/main.py

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+from bs4 import BeautifulSoup
+import re
+
+from db import DBManager, DBAttr
+from ui import WinesUI
+from req import Requester
+from __ssl import init_ssl
+from config import *
+
+init_ssl()
+
+dbm = DBManager(DB_PATH)
+req = Requester()
+
+def create_tables():
+    wines_attr = [
+        DBAttr("name", "TEXT", "NOT NULL"),
+        DBAttr("price", "INTEGER", "NOT NULL"),
+        DBAttr("origin", "TEXT", "NOT NULL"),
+        DBAttr("cellar", "TEXT", "NOT NULL"),
+        DBAttr("type", "TEXT", "NOT NULL")
+    ]
+    
+    types_attr = [
+        DBAttr("type", "TEXT")
+    ]
+    
+    dbm.create_table("wines", wines_attr)
+    dbm.create_table("types", types_attr)
+
+def main():        
+    pass
+        
+if __name__ == "__main__":
+    main()

ejercicios/beautifulsoup/ej1/src/req.py

@@ -0,0 +1,10 @@
+from urllib.request import urlopen, Request
+
+class Requester():
+    def __init__(self):
+        self.headers = {
+            "User-Agent": "Mozilla/5.0 (compatible; Konqueror/3.5.8; Linux)"
+        }
+        
+    def get(self, url):
+        return urlopen(Request(url, self.headers))

ejercicios/beautifulsoup/ej1/src/ui.py

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+import tkinter as tk
+from tkinter import ttk, messagebox
+from tkinter.scrolledtext import ScrolledText
+
+class WinesUI():
+    def __init__(self, root, title = "AII"):
+        self.root = root
+        self.root.title(title)
+        self.root.geometry("900x600")
+                
+        # Menu Principal
+        self.menu = tk.Menu(self.root)
+        self.root.config(menu=self.menu)
+
+        # Menu Datos
+        datos_menu = tk.Menu(self.menu, tearoff=0)
+        datos_menu.add_command(label="Cargar", command=lambda: self.callback("cargar"))
+        datos_menu.add_separator()
+        datos_menu.add_command(label="Salir", command=self.root.quit)
+        self.menu.add_cascade(label="Datos", menu=datos_menu)
+
+        # Menu Listar
+        listar_menu = tk.Menu(self.menu, tearoff=0)
+        listar_menu.add_command(label="Completo", command=lambda: self.callback("listar_completo"))
+        listar_menu.add_command(label="Ordenado", command=lambda: self.callback("listar_ordenado"))
+        self.menu.add_cascade(label="Listar", menu=listar_menu)
+
+        # Menu Buscar
+        buscar_menu = tk.Menu(self.menu, tearoff=0)
+        buscar_menu.add_command(label="Título", command=lambda: self.callback("buscar_titulo"))
+        buscar_menu.add_command(label="Editorial", command=lambda: self.callback("buscar_editorial"))
+        self.menu.add_cascade(label="Buscar", menu=buscar_menu)
+
+        # Callback externo desde el punto de entrada
+        self.callback = None
+        
+    def show_list(self, books, fields, title="Listado"):
+        mw = tk.Toplevel(self.root)
+        mw.title(title)
+        listbox = tk.Listbox(mw, width=80, height=20)
+        listbox.pack(side="left", fill="both", expand=True)
+        scrollbar = tk.Scrollbar(mw)
+        scrollbar.pack(side="right", fill="y")
+        listbox.config(yscrollcommand=scrollbar.set)
+        scrollbar.config(command=listbox.yview)
+        
+        for book in books:
+            row = " | ".join(str(book[field]) for field in fields)
+            listbox.insert("end", row)
+            
+    def ask_text(self, label, callback):
+        mw = tk.Toplevel(self.root)
+        mw.title(label)
+        tk.Label(mw, text=label).pack(pady=5)
+        entry = ttk.Entry(mw)
+        entry.pack(pady=5)
+        ttk.Button(mw, text="Aceptar", command=
+                    lambda: [callback(entry.get()), mw.destroy()]).pack(pady=10)   
+    
+    def ask_spinbox(self, label, options, callback):
+        mw = tk.Toplevel(self.root)
+        mw.title(label)
+        tk.Label(mw, text=label).pack(pady=5)
+        spinbox = ttk.Spinbox(mw, values=options, state="readonly", width=40)
+        spinbox.pack(pady=5)
+        ttk.Button(mw, text="Aceptar", command=
+                    lambda: [callback(spinbox.get()), mw.destroy()]).pack(pady=10)
+        
+    def ask_radiobutton(self, label, options, callback):
+        mw = tk.Toplevel(self.root)
+        mw.title(label)
+        tk.Label(mw, text=label).pack(pady=5)
+        sv = tk.StringVar(value=options[0])
+        for option in options:
+            tk.Radiobutton(mw, text=option, variable=sv, value=option).pack(anchor="w")
+        ttk.Button(mw, text="Aceptar", command=
+                    lambda: [callback(sv.get()), mw.destroy()]).pack(pady=10)
+        
+    def info(slef, message):
+        messagebox.showinfo("Información", message)