tricky questions.ipynb

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   "execution_count": 5,
   "metadata": {},
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       "False"
      ]
     },
     "execution_count": 5,
     "metadata": {},
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   ],
   "source": [
    "d = {\"john\": 40, \"peter\":45}\n",
    "\"John\" in d"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "5.5\n"
     ]
    }
   ],
   "source": [
    "x = 1/2.0 + 3 //3 + 4 ** 1\n",
    "print(x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 37,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'a' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-37-5206caf6d3cc>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[0ma\u001b[0m \u001b[1;33m=\u001b[0m \u001b[1;33m{\u001b[0m\u001b[1;36m1\u001b[0m\u001b[1;33m:\u001b[0m \u001b[1;34m\"A\"\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;36m2\u001b[0m\u001b[1;33m:\u001b[0m \u001b[1;34m\"B\"\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;36m3\u001b[0m\u001b[1;33m:\u001b[0m \u001b[1;34m\"C\"\u001b[0m\u001b[1;33m}\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      2\u001b[0m \u001b[1;32mdel\u001b[0m \u001b[0ma\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 3\u001b[1;33m \u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0ma\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m: name 'a' is not defined"
     ]
    }
   ],
   "source": [
    "a = {1: \"A\", 2: \"B\", 3: \"C\"}\n",
    "del a\n",
    "print(a)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 36,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{1: 5, 2: 3, 5: 6}\n",
      "{1: 5, 2: 3}\n"
     ]
    }
   ],
   "source": [
    "a = {1:5, 2:3, 3:4, 5:6}\n",
    "a.pop(3)\n",
    "print(a)\n",
    "a.popitem()\n",
    "print(a)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "4\n"
     ]
    }
   ],
   "source": [
    "a = {}\n",
    "a[1]=1\n",
    "a['1']=2\n",
    "a[1] = a[1]+1\n",
    "count= 0\n",
    "for i in a:\n",
    "    count+=a[i]\n",
    "print(count)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[2]\n"
     ]
    }
   ],
   "source": [
    "lst = [1,2,3,4]\n",
    "print(lst[-3:-2])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[(3, 1), (4, 2), (4, 1), (5, 2)]\n"
     ]
    }
   ],
   "source": [
    "s1=[3,4]\n",
    "s2=[1,2]\n",
    "s3=list()\n",
    "i=0\n",
    "j=0\n",
    "for i in s1:\n",
    "    for j in s2:\n",
    "        s3.append((i,j))\n",
    "        i+=1\n",
    "        j+=1\n",
    "print(s3)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{'Numbers': {1: 56, 3: 7}, 'Letters': {4: 'B'}}\n"
     ]
    }
   ],
   "source": [
    "numbers = {}\n",
    "letters = {}\n",
    "comb = {}\n",
    "numbers[1] = 56\n",
    "numbers[3] = 7\n",
    "letters[4]='B'\n",
    "comb['Numbers'] = numbers\n",
    "comb['Letters'] = letters\n",
    "print(comb)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[1, 3, 2, 1, 3, 2]"
      ]
     },
     "execution_count": 27,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "list1 = [1,3,2]\n",
    "list1*2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "0"
      ]
     },
     "execution_count": 28,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "A = 16\n",
    "B = 15\n",
    "A%B//A"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "5\n"
     ]
    }
   ],
   "source": [
    "numbers = [1,2,3,4]\n",
    "numbers.append([5,6,7,8])\n",
    "print(len(numbers))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 32,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "False"
      ]
     },
     "execution_count": 32,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "list1 = [11,2,23]\n",
    "list2 = [11,2,2]\n",
    "list1<list2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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