Dictionaries in Python: Definition, Syntax & Declaration - Python Tutorial for Beginners

Pubblicato il: 19 marzo 2021
sul canale di: Digital Academy
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🖥️ Dictionaries in Python: Definition, Syntax & Declaration

Dictionary in Python is a collection of items, which is: unordered, indexed by keys and mutable - so it can be changed, once it has been created.

While other Data Types have value as an element, a dictionary in Python has a "key: value" pair, where each key is mapped to a single value. Consequently, dictionaries are optimised to get values, when the key is known!

The important properties of Python dictionaries, are as follows:

○ Dictionaries are unordered – Items stored in a dictionary are not kept in order.
○ Dictionaries are mutable – They can be changed in place, grow and shrink - on demand.
○ Accessed by keys – Items are accessed by keys (indexed), not by their position (index).
○ Dictionaries can be nested – A dictionary can contain another dictionary - and so forth.

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Great! Now that you have understood what is a dictionary in Python, let's move forward and discover How to create a dictionary in Python. But, also what are all of the operations that you can perform on it in order to: Add, Remove or Access an item, even Search for an item inside of the dictionary. Are you interested to learn Dictionary in Python?

Let's play this video, stick around and watch until the end of this video! 👍🏻

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