17 - Exceptions - Python Programming Tutorial.ipynb

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   "cell_type": "code",
   "execution_count": 1,
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   "source": [
    "# assert\n",
    "output = 10\n",
    "assert output < 15, \"The condition fails\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "ename": "AssertionError",
     "evalue": "The condition fails",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mAssertionError\u001b[0m                            Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-2-919f77739800>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[0moutput\u001b[0m \u001b[1;33m=\u001b[0m \u001b[1;36m20\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 2\u001b[1;33m \u001b[1;32massert\u001b[0m \u001b[0moutput\u001b[0m \u001b[1;33m<\u001b[0m \u001b[1;36m15\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;34m\"The condition fails\"\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mAssertionError\u001b[0m: The condition fails"
     ]
    }
   ],
   "source": [
    "output = 20\n",
    "assert output < 15, \"The condition fails\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "# try - except"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Your code has error\n"
     ]
    }
   ],
   "source": [
    "# error\n",
    "l = [1,2,3]\n",
    "try:\n",
    "    l[5] = 10\n",
    "except:\n",
    "    print(\"Your code has error\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [],
   "source": [
    "# no error\n",
    "l = [1,2,3]\n",
    "try:\n",
    "    l[0] = 10\n",
    "except:\n",
    "    print(\"Your code has error\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Your code has error list assignment index out of range\n"
     ]
    }
   ],
   "source": [
    "# use appropriate error\n",
    "l = [1,2,3]\n",
    "try:\n",
    "    l[5] = 10\n",
    "except IndexError as e:\n",
    "    print(\"Your code has error\", e)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "ename": "IndexError",
     "evalue": "list index out of range",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mIndexError\u001b[0m                                Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-9-ac77afa80101>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0ml\u001b[0m\u001b[1;33m[\u001b[0m\u001b[1;36m5\u001b[0m\u001b[1;33m]\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mIndexError\u001b[0m: list index out of range"
     ]
    }
   ],
   "source": [
    "l[5]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "This is final code\n"
     ]
    }
   ],
   "source": [
    "# finally\n",
    "l = [1,2,3]\n",
    "try:\n",
    "    l[2] = 10\n",
    "except IndexError as e:\n",
    "    print(\"Your code has error\", e)\n",
    "finally:\n",
    "    print(\"This is final code\")"
   ]
  }
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