What do square brackets mean in python

In the Python language, you often see []. So what do the square brackets in Python mean?

There are three most common brackets in python language, namely: small brackets ( ), square brackets [ ] and curly brackets , also called braces Curly braces { } are used to represent different basic built-in data types of python.

The following explains their meanings respectively

1. Parentheses ( ) in python: represents the tuple tuple data type, and the tuple is an immutable sequence

2. Square brackets [ ] in python represent the list data type

3. python curly brackets { } curly braces: represent Dict dictionary data type, a dictionary is composed of key pair value groups. A colon ':' separates keys and values, and a comma ',' separates groups. The method of creating using braces is as follows

Note: Among the three data structures of list, tuple and dictionary, the tuples in the list and dictionary can be modified; and Once a tuple is created, its elements cannot be changed

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