dataclasses_note.ipynb

{
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  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "def add(first: int, second: int, third: int) -> int:\n",
    "    return first + second + third"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "7"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "add(first=1, second=2, third=4)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "7\n",
      "18\n"
     ]
    }
   ],
   "source": [
    "records = [(1, 2, 4), (5, 6, 7)]\n",
    "\n",
    "for record in records:\n",
    "    print(add(*record))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "7\n",
      "18\n"
     ]
    }
   ],
   "source": [
    "for first, second, third in records:\n",
    "    print(add(first=first, second=second, third=third))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 34,
   "metadata": {},
   "outputs": [],
   "source": [
    "from dataclasses import dataclass, asdict, field\n",
    "\n",
    "@dataclass\n",
    "class NumberInput:\n",
    "    first: int\n",
    "    second: int\n",
    "    third: int\n",
    "\n",
    "\n",
    "def add(input_: NumberInput) -> int:\n",
    "    return sum(asdict(input_).values())"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 35,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "8"
      ]
     },
     "execution_count": 35,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "add(input_=NumberInput(first=1, second=2, third=5))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 37,
   "metadata": {},
   "outputs": [],
   "source": [
    "from dataclasses import field\n",
    "\n",
    "@dataclass(frozen=True, order=True)\n",
    "class NumberInput:\n",
    "    first: int\n",
    "    second: int\n",
    "    third: int"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 38,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "NumberInput(first=1, second=2, third=5)\n"
     ]
    }
   ],
   "source": [
    "example = NumberInput(first=1, second=2, third=5)\n",
    "print(example)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 39,
   "metadata": {},
   "outputs": [
    {
     "ename": "FrozenInstanceError",
     "evalue": "cannot assign to field 'first'",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mFrozenInstanceError\u001b[0m                       Traceback (most recent call last)",
      "\u001b[1;32m/home/trazola/Desktop/programming/training/python/python-for-advance/dataclasses.ipynb Cell 9\u001b[0m line \u001b[0;36m1\n\u001b[0;32m----> <a href='vscode-notebook-cell:/home/trazola/Desktop/programming/training/python/python-for-advance/dataclasses.ipynb#X11sZmlsZQ%3D%3D?line=0'>1</a>\u001b[0m example\u001b[39m.\u001b[39;49mfirst \u001b[39m=\u001b[39m \u001b[39m3\u001b[39m\n",
      "File \u001b[0;32m<string>:4\u001b[0m, in \u001b[0;36m__setattr__\u001b[0;34m(self, name, value)\u001b[0m\n",
      "\u001b[0;31mFrozenInstanceError\u001b[0m: cannot assign to field 'first'"
     ]
    }
   ],
   "source": [
    "example.first = 3"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 40,
   "metadata": {},
   "outputs": [],
   "source": [
    "second_example = NumberInput(first=1, second=2, third=5)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 41,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 41,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "second_example == example"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 42,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "False"
      ]
     },
     "execution_count": 42,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "second_example > example"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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