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   "source": [
    "# Dictionaries - Exercises"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Exercise 6.1.\n",
    "\n",
    "The code below creates a new dictionary. This dictionary connects a number of ISBNs to the titles of the books they identify.\n",
    "\n",
    "```\n",
    "isbn = {\n",
    "9780143105985 : 'White Noise' ,\n",
    "9780241984536 : 'Libra' ,\n",
    "9781925480665 : 'Mao II' ,\n",
    "9781447289395 : 'Underworld' ,\n",
    "9780743595728 : 'The Body Artist' ,\n",
    "9781925480665 : 'Cosmopolis' ,\n",
    "9780330524919 : 'Falling man' ,\n",
    "9781439169971 : 'Point Omega'\n",
    "}\n",
    "```\n",
    "\n",
    "* Add the novel Zero K to the dictionary. This novel has ISBN13 9781501138072.\n",
    "* Write some code which can print the title that corresponds to ISBN 9781447289395. \n",
    "* Print a list of all the novels. Display both the ISBN and the title. "
   ]
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    "isbn = {\n",
    "9780143105985 : 'White Noise' ,\n",
    "9780241984536 : 'Libra' ,\n",
    "9781925480665 : 'Mao II' ,\n",
    "9781447289395 : 'Underworld' ,\n",
    "9780743595728 : 'The Body Artist' ,\n",
    "9781925480665 : 'Cosmopolis' ,\n",
    "9780330524919 : 'Falling man' ,\n",
    "9781439169971 : 'Point Omega'\n",
    "}\n",
    "\n",
    "isbn[9781501138072] = 'Zero K'\n",
    "\n",
    "index = 9781447289395\n",
    "print( \"\\nThe ISBN of the novel '{}' is {}.\\n\".format( isbn[index] , index ) )\n",
    "\n",
    "for novel in isbn:\n",
    "    print( isbn[novel] + ' (' + str(novel) + ')' )"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Exercise 6.2.\n",
    "\n",
    "Using the dictionary ‘data’ below, print the following sentence: “Louis Elsevier was a printer. He was born in 1540 in Leuven and died in 1617 in Leiden.”\n",
    "\n",
    "```\n",
    "data = dict()\n",
    "\n",
    "data[\"firstName\"] = 'louis'\n",
    "data[\"lastName\"] = 'elsevier'\n",
    "data[\"profession\"] = 'printer'\n",
    "data[\"yob\"] = 1540\n",
    "data[\"yod\"] = 1617\n",
    "data[\"pob\"] = 'leuven'\n",
    "data[\"pod\"] = 'leiden'\n",
    "```"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
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   "source": [
    "data = dict()\n",
    "\n",
    "data[\"firstName\"] = 'louis'\n",
    "data[\"lastName\"] = 'elsevier'\n",
    "data[\"profession\"] = 'printer'\n",
    "data[\"yob\"] = 1540\n",
    "data[\"yod\"] = 1617\n",
    "data[\"pob\"] = 'leuven'\n",
    "data[\"pod\"] = 'leiden'\n",
    "\n",
    "sentence = '{} {} was a {}. '.format( data['firstName'].title() , data['lastName'].title() , data['profession']  )\n",
    "sentence += 'He was born in {} in {} and died in {} in {}.'.format( data[\"yob\"] , data.get(\"pob\" , \"[Unknown]\" ).title() , data[\"yod\"] , data.get(\"pod\" , \"[Unknown]\" ).title()   )\n",
    "\n",
    "print( sentence )"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Exercise 6.3.\n",
    "\n",
    "Copy the code below in your code editor. Using the dictionary ‘eu’, print a sentence which gives information about the current number of countries in the EU. Add some code which can print a list of all the countries of the EU in alphabetical order. Finally, print a list of all the capitals of these countries, also in alphabetical order.\n",
    "\n",
    "```\n",
    "eu = {\n",
    "'Italy':'Rome' , 'Luxembourg':'Luxembourg' ,\n",
    "'Belgium':'Brussels' , 'Denmark':'Copenhagen' ,\n",
    "'Finland':'Helsinki' , 'France':'Paris' ,\n",
    "'Slovakia':'Bratislava' , 'Slovenia':'Ljubljana' ,\n",
    "'Germany':'Berlin' , 'Greece':'Athens' ,\n",
    "'Ireland':'Dublin' , 'Netherlands':'Amsterdam' ,\n",
    "'Portugal':'Lisbon' , 'Spain':'Madrid' ,\n",
    "'Sweden':'Stockholm' , 'United Kingdom':'London' ,\n",
    "'Cyprus':'Nicosia' , 'Lithuania':'Vilnius' , 'Czech\n",
    "Republic':'Prague' , 'Estonia':'Tallin' ,\n",
    "'Hungary':'Budapest' , 'Latvia':'Riga' ,\n",
    "'Malta':'Valetta' , 'Austria':'Vienna' ,\n",
    "'Poland':'Warsaw' , 'Croatia':'Zagreb'\n",
    ",'Romania':'Bucharest' , 'Bulgaria':'Sofia' }```"
   ]
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   "cell_type": "code",
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   "source": [
    "eu = {\n",
    "'Italy':'Rome' , 'Luxembourg':'Luxembourg' , 'Belgium':'Brussels' , 'Denmark':'Copenhagen' , 'Finland':'Helsinki' , 'France':'Paris' , 'Slovakia':'Bratislava' , 'Slovenia':'Ljubljana' , 'Germany':'Berlin' , 'Greece':'Athens' , 'Ireland':'Dublin' , 'Netherlands':'Amsterdam' , 'Portugal':'Lisbon' , 'Spain':'Madrid' , 'Sweden':'Stockholm' , 'United Kingdom':'London' , 'Cyprus':'Nicosia' , 'Lithuania':'Vilnius' , 'Czech Republic':'Prague' , 'Estonia':'Tallin' , 'Hungary':'Budapest' , 'Latvia':'Riga' , 'Malta':'Valetta' , 'Austria':'Vienna' , 'Poland':'Warsaw' , 'Croatia':'Zagreb' ,'Romania':'Bucharest' , 'Bulgaria':'Sofia' }\n",
    "\n",
    "print( 'The EU currently has {} member countries:'.format( len(eu) ) )\n",
    "\n",
    "\n",
    "for country in sorted(eu):\n",
    "    print( country )\n",
    "\n",
    "    \n",
    "\n",
    "print('\\n')\n",
    "\n",
    "def getSortedKeys( dict ):\n",
    "    return sorted( dict , key=lambda x: dict[x]) \n",
    "\n",
    "\n",
    "for country in getSortedKeys( eu ):\n",
    "    print( 'The capital of {} is {}.'.format( country , eu[country] ) )\n"
   ]
  }
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