Udemy dictionaries.ipynb

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       "2.3"
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     "execution_count": 11,
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    "# difference between lists: can not be sorted or indexed, or sliced\n",
    "# use {} for defining a dictionary, when recalling from the dictioanary, use []\n",
    "# dictionary type: name = { integer, 'string' etc : ... , }\n",
    "prices={'apple':2.3,'orange':1.4, 'pineaplle':3.9}\n",
    "prices['apple']\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'inside list': 4.5}"
      ]
     },
     "execution_count": 20,
     "metadata": {},
     "output_type": "execute_result"
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   ],
   "source": [
    "#inside the dictionaries there can be lists, other dictionaries or different types\n",
    "dict1={'a':[1,2,3,4], 'b':{'inside list':4.5}, 'c':100, 'd':['al','bl','cl']}\n",
    "dict1['b']"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "4.5"
      ]
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     "execution_count": 16,
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   "source": [
    "# no need to write = after the name for recalling a dictionary\n",
    "#you can recall an item from an inside dictionary \n",
    "#it is also possoble to use list functions in dictionaries\n",
    "#such as sort(), upper(),indexing  \n",
    "dict1['b']['inside list']"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'CL'"
      ]
     },
     "execution_count": 23,
     "metadata": {},
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   "source": [
    "dict1['d'][2].upper()"
   ]
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   "cell_type": "code",
   "execution_count": 24,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "dict_items([('a', [1, 2, 3, 4]), ('b', {'inside list': 4.5}), ('c', 100), ('d', ['al', 'bl', 'cl'])])"
      ]
     },
     "execution_count": 24,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# in dictionaries there are keys and their values. items are both of them. they can be recalled seperately\n",
    "dict1.items()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "dict_values([[1, 2, 3, 4], {'inside list': 4.5}, 100, ['al', 'bl', 'cl']])"
      ]
     },
     "execution_count": 25,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "dict1.values()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "dict_keys(['a', 'b', 'c', 'd'])"
      ]
     },
     "execution_count": 26,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "dict1.keys()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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