{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "ce327730",
   "metadata": {},
   "outputs": [],
   "source": [
    "def foo():\n",
    "    assert 1 == 2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "f8ca175e",
   "metadata": {},
   "outputs": [],
   "source": [
    "def bar():\n",
    "    foo()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "68e112d4",
   "metadata": {},
   "outputs": [],
   "source": [
    "def baz():\n",
    "    bar()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "2e2aa76b",
   "metadata": {},
   "outputs": [
    {
     "ename": "AssertionError",
     "evalue": "",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mAssertionError\u001b[0m                            Traceback (most recent call last)",
      "Input \u001b[0;32mIn [4]\u001b[0m, in \u001b[0;36m<cell line: 1>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0m baz()\n",
      "Input \u001b[0;32mIn [3]\u001b[0m, in \u001b[0;36mbaz\u001b[0;34m()\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[38;5;28;01mdef\u001b[39;00m \u001b[38;5;21mbaz\u001b[39m():\n\u001b[0;32m----> 2\u001b[0m     \u001b[43mbar\u001b[49m\u001b[43m(\u001b[49m\u001b[43m)\u001b[49m\n",
      "Input \u001b[0;32mIn [2]\u001b[0m, in \u001b[0;36mbar\u001b[0;34m()\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[38;5;28;01mdef\u001b[39;00m \u001b[38;5;21mbar\u001b[39m():\n\u001b[0;32m----> 2\u001b[0m     \u001b[43mfoo\u001b[49m\u001b[43m(\u001b[49m\u001b[43m)\u001b[49m\n",
      "Input \u001b[0;32mIn [1]\u001b[0m, in \u001b[0;36mfoo\u001b[0;34m()\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[38;5;28;01mdef\u001b[39;00m \u001b[38;5;21mfoo\u001b[39m():\n\u001b[0;32m----> 2\u001b[0m     \u001b[38;5;28;01massert\u001b[39;00m \u001b[38;5;241m1\u001b[39m \u001b[38;5;241m==\u001b[39m \u001b[38;5;241m2\u001b[39m\n",
      "\u001b[0;31mAssertionError\u001b[0m: "
     ]
    }
   ],
   "source": [
    "baz()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "d6b481da",
   "metadata": {},
   "outputs": [],
   "source": [
    "def err1(x):\n",
    "    return 8/x"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "9423bc95",
   "metadata": {},
   "outputs": [
    {
     "ename": "ZeroDivisionError",
     "evalue": "division by zero",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mZeroDivisionError\u001b[0m                         Traceback (most recent call last)",
      "Input \u001b[0;32mIn [7]\u001b[0m, in \u001b[0;36m<cell line: 1>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0m err1(\u001b[38;5;241m0\u001b[39m)\n",
      "Input \u001b[0;32mIn [6]\u001b[0m, in \u001b[0;36merr1\u001b[0;34m(x)\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[38;5;28;01mdef\u001b[39;00m \u001b[38;5;21merr1\u001b[39m(x):\n\u001b[0;32m----> 2\u001b[0m     \u001b[38;5;28;01mreturn\u001b[39;00m \u001b[38;5;241;43m8\u001b[39;49m\u001b[38;5;241;43m/\u001b[39;49m\u001b[43mx\u001b[49m\n",
      "\u001b[0;31mZeroDivisionError\u001b[0m: division by zero"
     ]
    }
   ],
   "source": [
    "err1(0)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "id": "b57fc1c8",
   "metadata": {},
   "outputs": [],
   "source": [
    "d = { \"Jenny\":8675309}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "id": "54023b85",
   "metadata": {},
   "outputs": [
    {
     "ename": "KeyError",
     "evalue": "'Mattox'",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mKeyError\u001b[0m                                  Traceback (most recent call last)",
      "Input \u001b[0;32mIn [9]\u001b[0m, in \u001b[0;36m<cell line: 1>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0m d[\u001b[38;5;124m'\u001b[39m\u001b[38;5;124mMattox\u001b[39m\u001b[38;5;124m'\u001b[39m]\n",
      "\u001b[0;31mKeyError\u001b[0m: 'Mattox'"
     ]
    }
   ],
   "source": [
    "d['Mattox']"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "id": "4955ee9e",
   "metadata": {},
   "outputs": [],
   "source": [
    "mylist = [2,3,4,5]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "id": "7c600619",
   "metadata": {},
   "outputs": [
    {
     "ename": "IndexError",
     "evalue": "list index out of range",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mIndexError\u001b[0m                                Traceback (most recent call last)",
      "Input \u001b[0;32mIn [11]\u001b[0m, in \u001b[0;36m<cell line: 1>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0m mylist[\u001b[38;5;241m10\u001b[39m]\n",
      "\u001b[0;31mIndexError\u001b[0m: list index out of range"
     ]
    }
   ],
   "source": [
    "mylist[10]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "id": "a89fb5df",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "False"
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "'Mattox' in d"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "id": "7e53db36",
   "metadata": {},
   "outputs": [
    {
     "ename": "TypeError",
     "evalue": "list indices must be integers or slices, not str",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
      "Input \u001b[0;32mIn [13]\u001b[0m, in \u001b[0;36m<cell line: 1>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0m mylist[\u001b[38;5;124m'\u001b[39m\u001b[38;5;124mhi\u001b[39m\u001b[38;5;124m'\u001b[39m]\n",
      "\u001b[0;31mTypeError\u001b[0m: list indices must be integers or slices, not str"
     ]
    }
   ],
   "source": [
    "mylist['hi']"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "id": "0e7ccaa1",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Give me an index: 999\n"
     ]
    },
    {
     "ename": "IndexError",
     "evalue": "list index out of range",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mIndexError\u001b[0m                                Traceback (most recent call last)",
      "Input \u001b[0;32mIn [15]\u001b[0m, in \u001b[0;36m<cell line: 2>\u001b[0;34m()\u001b[0m\n\u001b[1;32m      1\u001b[0m i \u001b[38;5;241m=\u001b[39m \u001b[38;5;28mint\u001b[39m(\u001b[38;5;28minput\u001b[39m(\u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mGive me an index: \u001b[39m\u001b[38;5;124m\"\u001b[39m))\n\u001b[0;32m----> 2\u001b[0m mylist[i]\n",
      "\u001b[0;31mIndexError\u001b[0m: list index out of range"
     ]
    }
   ],
   "source": [
    "i = int(input(\"Give me an index: \"))\n",
    "mylist[i]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "id": "2ffc8057",
   "metadata": {},
   "outputs": [],
   "source": [
    "def safeLookup():\n",
    "    try:\n",
    "        i = int(input(\"Give me an index: \"))\n",
    "        return mylist[i]\n",
    "    except:\n",
    "        print(\"Ug.  Something went wrong.\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "id": "2f5d6bc3",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Give me an index: 10\n",
      "Ug.  Something went wrong.\n"
     ]
    }
   ],
   "source": [
    "safeLookup()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "id": "e51d3fbd",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Give me an index: 3\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "5"
      ]
     },
     "execution_count": 18,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "safeLookup()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "id": "8b782b26",
   "metadata": {},
   "outputs": [],
   "source": [
    "def safeLookup():\n",
    "    try:\n",
    "        i = int(input(\"Give me an index: \"))\n",
    "        return mylist[i]\n",
    "    except IndexError:\n",
    "        print(\"It needs to be from 0 to 3\")\n",
    "    except ValueError:\n",
    "        print(\"Please stick with integers.\")\n",
    "    except Exception as e:\n",
    "        print(\"Ug.  Something went wrong.\")\n",
    "        print(e)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 29,
   "id": "07877058",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Give me an index: 234\n",
      "It needs to be from 0 to 3\n"
     ]
    }
   ],
   "source": [
    "safeLookup()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "id": "b6a75216",
   "metadata": {},
   "outputs": [],
   "source": [
    "class BadDay(Exception):\n",
    "    pass"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "id": "0084cd6f",
   "metadata": {},
   "outputs": [],
   "source": [
    "def howAreYou():\n",
    "    d = input(\"What day is it? \")\n",
    "    if d=='Monday':\n",
    "        raise BadDay\n",
    "    else:\n",
    "        print(\"Good day!\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 32,
   "id": "67fa78ed",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "What day is it? Monday\n"
     ]
    },
    {
     "ename": "BadDay",
     "evalue": "",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mBadDay\u001b[0m                                    Traceback (most recent call last)",
      "Input \u001b[0;32mIn [32]\u001b[0m, in \u001b[0;36m<cell line: 1>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0m howAreYou()\n",
      "Input \u001b[0;32mIn [31]\u001b[0m, in \u001b[0;36mhowAreYou\u001b[0;34m()\u001b[0m\n\u001b[1;32m      2\u001b[0m d \u001b[38;5;241m=\u001b[39m \u001b[38;5;28minput\u001b[39m(\u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mWhat day is it? \u001b[39m\u001b[38;5;124m\"\u001b[39m)\n\u001b[1;32m      3\u001b[0m \u001b[38;5;28;01mif\u001b[39;00m d\u001b[38;5;241m==\u001b[39m\u001b[38;5;124m'\u001b[39m\u001b[38;5;124mMonday\u001b[39m\u001b[38;5;124m'\u001b[39m:\n\u001b[0;32m----> 4\u001b[0m     \u001b[38;5;28;01mraise\u001b[39;00m BadDay\n\u001b[1;32m      5\u001b[0m \u001b[38;5;28;01melse\u001b[39;00m:\n\u001b[1;32m      6\u001b[0m     \u001b[38;5;28mprint\u001b[39m(\u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mGood day!\u001b[39m\u001b[38;5;124m\"\u001b[39m)\n",
      "\u001b[0;31mBadDay\u001b[0m: "
     ]
    }
   ],
   "source": [
    "howAreYou()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "06d46678",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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