Python/Tuples.ipynb

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   "source": [
    "## Tuples"
   ]
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    "l = [1, 2, 3]\n",
    "l"
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    "t = (1, 2, 3)\n",
    "t"
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   "metadata": {},
   "outputs": [
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     "data": {
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       "3"
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   "source": [
    "len(t)"
   ]
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   "cell_type": "code",
   "execution_count": 4,
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "('one', 2)"
      ]
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     "execution_count": 4,
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     "output_type": "execute_result"
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    "t = ('one', 2)\n",
    "t"
   ]
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  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'one'"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
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   "source": [
    "t[0]"
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       "2"
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     "execution_count": 6,
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   "source": [
    "t[1]"
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   "cell_type": "code",
   "execution_count": 7,
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     "data": {
      "text/plain": [
       "2"
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     "execution_count": 7,
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   ],
   "source": [
    "t[-1]"
   ]
  },
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   "cell_type": "code",
   "execution_count": 8,
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "0"
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     "execution_count": 8,
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   "source": [
    "t.index('one')"
   ]
  },
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   "cell_type": "code",
   "execution_count": 9,
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "1"
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     "execution_count": 9,
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   ],
   "source": [
    "t.index(2)"
   ]
  },
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   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1"
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     "execution_count": 10,
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   "source": [
    "t.count('one')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "t = (1, 1, 2, 3)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "2"
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
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   ],
   "source": [
    "t.count(1)"
   ]
  },
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   "metadata": {},
   "source": [
    "Tuples are immutable, so items inside the tuple can't be changed"
   ]
  },
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   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[1, 2, 3]"
      ]
     },
     "execution_count": 13,
     "metadata": {},
     "output_type": "execute_result"
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   ],
   "source": [
    "l = [1, 2, 3]\n",
    "l"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {
    "collapsed": true
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   "outputs": [],
   "source": [
    "t = (1, 2, 3)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['s', 2, 3]"
      ]
     },
     "execution_count": 15,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "l[0] = 's'\n",
    "l"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Tuples has fewer methods to use compared to lists. Tuples can only use two methods; count and index."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Tuples are used in order to avoid changing the sequences by mistake."
   ]
  }
 ],
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