{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "507a96bf",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "(Pippo: a = 3)\n",
      "sono STR!! (Pippo: a = 3)\n"
     ]
    }
   ],
   "source": [
    "class Pippo:\n",
    "    def __init__(self, a:int) -> None:\n",
    "        self.a = a\n",
    "\n",
    "    def __repr__(self) -> str:\n",
    "        return f\"(Pippo: a = {self.a})\";\n",
    "\n",
    "    def __str__(self) -> str:\n",
    "        return f\"sono STR!! (Pippo: a = {self.a})\";\n",
    "    \n",
    "\n",
    "p = Pippo (3)\n",
    "print (p.__repr__())\n",
    "print (p)\n",
    "\n"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "d014a3dd",
   "metadata": {},
   "source": [
    "__repr__ è pensato per restituire una rappresentazione COMPLETA dell'oggetto, dalla quale si possa ricostruire completamente l'oggetto, ad esempio a scopo di DEBUG\n",
    "\n",
    "__str__ è pensato per restituire una rappresentazione DIVULGATIVA dell'oggetto. Se manca, viene richiamato in automatico __repr__"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "7b0b9d86",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Pippo.conto = 0\n",
      "Pippo.conto = 1\n",
      "Pippo.conto = 2\n",
      "p.a = 3\n",
      "q.a = 10\n"
     ]
    }
   ],
   "source": [
    "class Pippo:\n",
    "    conto:int = 0\n",
    "    def __init__(self, a:int) -> None:\n",
    "        self.a = a\n",
    "        Pippo.conto += 1\n",
    "\n",
    "    def __repr__(self) -> str:\n",
    "        return f\"(Pippo: a = {self.a})\";\n",
    "\n",
    "    def __str__(self) -> str:\n",
    "        return f\"sono STR!! (Pippo: a = {self.a})\";\n",
    "    \n",
    "print (f\"Pippo.conto = {Pippo.conto}\")\n",
    "p = Pippo (3)\n",
    "print (f\"Pippo.conto = {p.conto}\")\n",
    "q = Pippo (10)\n",
    "#Pippo.conto = 23\n",
    "print (f\"Pippo.conto = {p.conto}\")\n",
    "print (f\"p.a = {p.a}\")\n",
    "print (f\"q.a = {q.a}\")\n",
    "\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "18e29aeb",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "(Pippo: a = 3; b = 20)\n",
      "(Pippo: a = 10; b = 20)\n",
      "2\n",
      "20\n",
      "21\n",
      "20\n"
     ]
    }
   ],
   "source": [
    "from typing import ClassVar\n",
    "\n",
    "class Pippo:\n",
    "    conto:ClassVar[int] = 0\n",
    "    b:int = 20\n",
    "    def __init__(self, a:int) -> None:\n",
    "        self.a = a\n",
    "        #self.b = self.b + 1\n",
    "        Pippo.conto += 1\n",
    "\n",
    "    def __repr__(self) -> str:\n",
    "        return f\"(Pippo: a = {self.a}; b = {self.b})\"\n",
    "    \n",
    "p = Pippo (3)\n",
    "q = Pippo (10)\n",
    "print (p)\n",
    "print (q)\n",
    "print (p.conto)\n",
    "print (p.b)\n",
    "\n",
    "p.conto=20\n",
    "p.b=p.b+1\n",
    "print (p.b)\n",
    "print (q.b)\n"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.12.10"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 5
}