new_types.ipynb

new_types.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Student(name='Tommy Johnson', address='Main street', age=22, sex='M')"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "from typing import NamedTuple\n",
    "\n",
    "class Student(NamedTuple):\n",
    "    name: str\n",
    "    address: str\n",
    "    age: int\n",
    "    sex: str\n",
    "        \n",
    "tommy = Student(name='Tommy Johnson', address='Main street', age=22, sex='M')\n",
    "tommy"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "True\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "'Tommy Johnson'"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "print(isinstance(tommy, tuple))\n",
    "tommy[0]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "ename": "TypeError",
     "evalue": "__new__() missing 1 required positional argument: 'sex'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-3-c36c04942fdd>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[0;32m      2\u001b[0m     \u001b[0msex\u001b[0m\u001b[1;33m:\u001b[0m \u001b[0mstr\u001b[0m \u001b[1;33m=\u001b[0m \u001b[1;34m'M'\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      3\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 4\u001b[1;33m \u001b[0mMaleStudent\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mname\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;34m'Tommy Johnson'\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0maddress\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;34m'Main Street'\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mage\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;36m22\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m: __new__() missing 1 required positional argument: 'sex'"
     ]
    }
   ],
   "source": [
    "class MaleStudent(Student):\n",
    "    sex: str = 'M'\n",
    "        \n",
    "MaleStudent(name='Tommy Johnson', address='Main Street', age=22)"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python [conda env:tea_facts]",
   "language": "python",
   "name": "conda-env-tea_facts-py"
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  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.6.4"
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