3.2 Lesson Period 2 - Dictionaries Data Abstraction

Dictionaries - 3.2.6

mydictionary = {
  #key : value
  "brand": "Ford",
  "model": "Mustang",
  "year": 1964
}

# Dictionaries are abstractions because they allow for efficient storage and retrieval of key-value pairs without exposing the underlying workings

print("\nThe whole dictionary is:")
print(mydictionary)

print("\nThe value of the key 'brand' is:")
     #dictionaryname[key]
print(mydictionary["brand"])


print("\nThe value of the key 'model' is:")
print(mydictionary["model"])

print("\nThe value of the key 'year' is:")
print(mydictionary["year"])

The whole dictionary is:
{'brand': 'Ford', 'model': 'Mustang', 'year': 1964}

The value of the key 'brand' is:
Ford

The value of the key 'model' is:
Mustang

The value of the key 'year' is:
1964

Javascript Version

%%js
var mydictionary = {
    "brand": "Ford",
    "model": "Mustang",
    "year": 1964
};

json_object = JSON.stringify(mydictionary, null, 2)
console.log(json_object)
console.log(mydictionary["brand"])
console.log(mydictionary["model"])
console.log(mydictionary["year"])

<IPython.core.display.Javascript object>

Serialization and Deserialization

The process of serialization is to “convert an object’s state into a format that can be transported” Pretty simply: converting object types from one another

The process we will show is python dictionaries to JSON strings!

import json #importing the json library

#let's use our dictionary from before!
jsondict = json.dumps(mydictionary) #converts the dictionary to a json string
print("\nOur dictionary as a json string:", jsondict)

Our dictionary as a json string: {"brand": "Ford", "model": "Mustang", "year": 1964}