Python List

Python_list.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "674b6e44",
   "metadata": {},
   "outputs": [],
   "source": [
    "x = [1,'Hello',  True,  1.093E-3, '#fff']"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "85b32fb3",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "#fff\n"
     ]
    }
   ],
   "source": [
    "print(x[-1])\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "29d0dc89",
   "metadata": {},
   "outputs": [],
   "source": [
    "x = [9, 3, 4, 1, 4, 5, 6, 3, 7, 8]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "id": "aa6ad5e3",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "4\n",
      "1\n",
      "4\n",
      "5\n"
     ]
    }
   ],
   "source": [
    "for i in x[2:6]:\n",
    "    print(i)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "id": "f0c8e91f",
   "metadata": {},
   "outputs": [],
   "source": [
    "x = [1, 2, 3, 4, 5]\n",
    "y = ['a', 'b', 'c']\n",
    "z = x.pop(1)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "id": "ef771edd",
   "metadata": {},
   "outputs": [],
   "source": [
    "y.insert(1, z)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "id": "8fb327be",
   "metadata": {},
   "outputs": [],
   "source": [
    "z = x + y"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "id": "574a2c8f",
   "metadata": {},
   "outputs": [],
   "source": [
    "x = [1, 3, 4, 5]\n",
    "y = ['a', 2, 'b', 'c']\n",
    "z = [1, 3, 4, 5, 'a', 2, 'b', 'c']"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "id": "d327f13a",
   "metadata": {},
   "outputs": [],
   "source": [
    "a = 'aiueo'\n",
    "b = tuple(a)\n",
    "c = list (b)\n",
    "d = c\n",
    "e = list (d)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "id": "2cefc7b7",
   "metadata": {},
   "outputs": [],
   "source": [
    "c[1] = 2000"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "id": "6bd70cba",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['a', 2000, 'u', 'e', 'o']\n"
     ]
    }
   ],
   "source": [
    "print(d)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "id": "1ebf4f1b",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['a', 'i', 'u', 'e', 'o']\n"
     ]
    }
   ],
   "source": [
    "print(e)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "id": "3c6ecf6c",
   "metadata": {},
   "outputs": [],
   "source": [
    "result = sorted([5, 0, 1, 3, 4, 2])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "id": "9f872686",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "count of 1: 4\n",
      "\n",
      "1st index of 1: 1\n",
      "\n",
      "2nd index of 1: 2\n"
     ]
    }
   ],
   "source": [
    "x = [0, 1, 2, 3, 1, 4, 5, 6, 1, 9, 9, 1]\n",
    "print('count of 1:', x.count(1))\n",
    "print()\n",
    "\n",
    "c0 = x.index(1)\n",
    "print('1st index of 1:', c0)\n",
    "print()\n",
    "\n",
    "c1 = x[c0 + 1:].index(1)\n",
    "print('2nd index of 1:', c1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "id": "73d52525",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[0, 2, 4]\n",
      "[1, 3, 5]\n",
      "[1, 3, 5, 3, 5, 7, 5, 7, 9]\n"
     ]
    }
   ],
   "source": [
    "x = [i for i in range(0, 5, 2)]\n",
    "y = [i for i in range(1, 6, 2)]\n",
    "z = [i+j for i in x for j in y]\n",
    "\n",
    "print (x)\n",
    "print (y)\n",
    "print (z)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "id": "2d419136",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "original\n",
      "[1, 5, 2, 4, 3] \n",
      "\n",
      "after bubble sort\n",
      "[1, 2, 3, 4, 5]\n"
     ]
    }
   ],
   "source": [
    "x = [1, 5, 2, 4, 3]\n",
    "print('original'); print(x, '\\n')\n",
    "\n",
    "N = len(x)\n",
    "\n",
    "for i in range(N):\n",
    "    for j in range(i+1, N):\n",
    "        if x[i] > x[j]:\n",
    "            x[i], x[j] = x[j], x[i]\n",
    "            \n",
    "print('after bubble sort'); print(x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "id": "491d22ab",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "original\n",
      "[1, 5, 2, 4, 3] \n",
      "\n",
      "after bubble sort\n",
      "[5, 4, 3, 2, 1]\n"
     ]
    }
   ],
   "source": [
    "x = [1, 5, 2, 4, 3]\n",
    "print('original'); print(x, '\\n')\n",
    "\n",
    "N = len(x)\n",
    "\n",
    "for i in range(N):\n",
    "    for j in range(i+1, N):\n",
    "        if x[i] < x[j]:\n",
    "            x[i], x[j] = x[j], x[i]\n",
    "            \n",
    "print('after bubble sort'); print(x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "id": "97ea3e94",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['a', 1, 'b', 2, 'c', ['a', 2000, 'u', 'e', 'o']] \n",
      "\n",
      "[1, 2, ['a', 2000, 'u', 'e', 'o']]\n"
     ]
    }
   ],
   "source": [
    "def sep_odd_even_index(z):\n",
    "    N = len(z)\n",
    "    r = range(N)\n",
    "    x = [z[i] for i in r if i % 2 == 0]\n",
    "    y = [z[i] for i in r if i % 2 == 1]\n",
    "    return [x,y]\n",
    "\n",
    "mix = ['a', 1, 'b', 2, 'c',d]\n",
    "x , y = sep_odd_even_index(mix)\n",
    "print(mix, '\\n')\n",
    "print(y)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "a9f54de3",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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