Dictionary in Python

Last updated Aug 09, 2021

Dictionary

Dictionary is different from both list and tuple as it is an unordered collection of key-value pairs and is always written in key: value pair. It is also a built-in data type. These are used for retrieving data. A dictionary is always represented with curly brackets{ }. The values of a dictionary can be of any type, but the keys must be of an immutable data type such as strings, numbers, or tuples.

 

Let's take an example of Dictionary:-

a = {1:"Rohan", 2:"Sumit", 3:"Karan", 4:"Aman"} print(a)

 

{1: 'Rohan', 2: 'Sumit', 3: 'Karan', 4: 'Aman'}

 

So you can see that we had obtained a dictionary.

Now let's take an other example of Dictionary:-

marks = {}.fromkeys(['Math', 'English', 'Science'], 0) print(marks) for item in marks.items():      print(item) print(list(sorted(marks.keys())))

{'Math': 0, 'English': 0, 'Science': 0}

('Math', 0)

('English', 0)

('Science', 0)

['English', 'Math', 'Science']

 

We hope that you got a better understanding of Dictionary in Python.