What is Dictionary?

dicts = {'a':1, 'b':2, 'c':3

Dictionary in Python or hash table (hashmap) in other programming language is one of the data structures that is the most efficient to store and take value. They store each of value towards key that is creating couple value of key. (Key is a, b, c while value is 1, 2, 3)

Defining Dictionary?

• Dictionary is the implementation Python from data stucture that is more commonly known as associative array. Dictionaries consist of couple groups of key value. Each of key value couple is mapping key to respective value.

• We can define dictionary as attaching list of key value couples that is divided with coma inside of curly braces ({ }). Semi colon (:) divides each of key from respective value.

  

Accessing Dictionary?

Entry in Dictionary is shown in the list that has been determined. But it is irrelevant when it comes to take them. The dictionary elements cannot be accessed by numeric index.

print(sport_team['Minnesota'])
print(sport_team['Colorado'])

• Of course, Dictionary element must have access whatever it is. If we cannot get it according to index, then how do we get it?
• The value is taken from dictionary with determining key that is suitable in square bracket ([ ])

Note: In dictionary we can’t access the item with indexing. We can do that by actually calling the keys.

Dictionary Keys vs. List Indices