7_Dictionaries.ipynb

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   "source": [
    "# Dictionaries | Python for Data Science"
   ]
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     "text": [
      "[{'name': 'Alice', 'age': 28}, {'name': 'Bob', 'age': 22}, {'name': 'Charlie', 'age': 28}, {'name': 'David', 'age': 22}]\n",
      "_______\n",
      "[{'name': 'Bob', 'age': 22}, {'name': 'David', 'age': 22}, {'name': 'Alice', 'age': 28}, {'name': 'Charlie', 'age': 28}]\n",
      "{22: [{'name': 'Bob', 'age': 22}, {'name': 'David', 'age': 22}], 28: [{'name': 'Alice', 'age': 28}, {'name': 'Charlie', 'age': 28}]}\n"
     ]
    }
   ],
   "source": [
    "from itertools import groupby\n",
    "\n",
    "people = [\n",
    "    {'name': 'Alice', 'age': 28},\n",
    "    {'name': 'Bob', 'age': 22},\n",
    "    {'name': 'Charlie', 'age': 28},\n",
    "    {'name': 'David', 'age': 22}\n",
    "]\n",
    "\n",
    "# Group people by age\n",
    "print(people)\n",
    "people.sort(key=lambda x: x['age']) # We can sort dictionary according to it's values. \n",
    "print(\"_______\")\n",
    "print(people)\n",
    "\n",
    "\n",
    "grouped_people = {age: list(group) for age, group in groupby(people, key=lambda x: x['age'])}\n",
    "\n",
    "\n",
    "print(grouped_people)\n"
   ]
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   "outputs": [],
   "source": []
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