list.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# List\n",
    "chứa mọi thứ trong python"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Khoi tao list"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "`sd []`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst1 = [1, 2, (1,2), [1, 2], \"1, 2\"]\n",
    "lst1"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "`list comprehension`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst2 = [idx+2 for idx in range(10) if idx>2 and idx<8]\n",
    "lst2 "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "`constructor list`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst3 = list('Sang')\n",
    "lst3"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Indexing"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst = [1, 2, 3, 4, 5]\n",
    "lst[0] "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst[:]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst[:-1]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst[::]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst[::-1]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "matrix = [[[1,2,3],[4,5,6],[7,8,9]],\n",
    "          [[1,2,3],[4,5,6],[7,8,9]]]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "len(matrix)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "matrix[0][1][-1]"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Toan tu"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "a = [[1,2,3]]\n",
    "b = [4,5,6]\n",
    "a+b\n",
    "a * 3"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "5 in b"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Methods"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst = [1,2,3,4,5]\n",
    "lst = lst.append(6)\n",
    "lst is None "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst = [1,2,3,4,5]\n",
    "lst.append([98,99,100])\n",
    "lst"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst.extend([6,7,8])\n",
    "lst "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst.insert(5, 1998)\n",
    "lst"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst.pop(4) #bỏ đi phần tử index nhập vào trong list\n",
    "lst "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst.pop() #ko nhập index thì auto bỏ phần tử  index -1 của list (phần tử cuối)\n",
    "lst "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "`các phương thức sắp xếp: sort(), sorted(), reverse()`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst = [1, 3, 2 , 67, 34, 22, 99, 100, 11]\n",
    "lst.sort()  #sort() ko trả về\n",
    "print(lst) \n",
    "lst.sort(reverse=True)\n",
    "print(lst)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst = [1, 3, 2 , 67, 34, 22, 99, 100, 11]\n",
    "lst.reverse()\n",
    "lst "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "lst = [1, 3, 2 , 67, 34, 22, 99, 100, 11]\n",
    "sorted_list = sorted(lst)   #sorted() trả về\n",
    "sorted_list "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Phép gán"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "`case1`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "a = [1,2,3]\n",
    "b = a\n",
    "c = [a,b]\n",
    "print(a)\n",
    "print(b)\n",
    "print(c)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "a.append(100)\n",
    "print(a)\n",
    "print(b)\n",
    "print(c)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "`case2`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "a = [1,2,3]\n",
    "b = a\n",
    "c = [a,b]\n",
    "print(a)\n",
    "print(b)\n",
    "print(c)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "c[0] = 99\n",
    "print(a)\n",
    "print(b)\n",
    "print(c)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "c[1].append(999)\n",
    "print(a)\n",
    "print(b)\n",
    "print(c)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "`case3`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "a = [1,2,3]\n",
    "b = a\n",
    "a = [4,5,6]\n",
    "print(a)\n",
    "print(b)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "def func(lst=[1,2]):\n",
    "    lst.append(100)\n",
    "    return lst\n",
    "lst1 = func()\n",
    "lst2 = func()\n",
    "lst3 = func()\n",
    "print(lst1, lst2, lst3) "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Copy "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "`shallow`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "a = [2,3,[100,101],4]\n",
    "b = list(a) # Make a copy\n",
    "a is b"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "a[2].append(102)\n",
    "print(a)\n",
    "print(b)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "`deep copy`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "a = [2,3,[100,101],4]\n",
    "import copy\n",
    "b = copy.deepcopy(a)\n",
    "a[2].append(102)\n",
    "print(a)\n",
    "print(b)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "`Container objects only hold references\n",
    "(pointers) to their stored values`"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": []
  }
 ],
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