Python Common data structures

There are four most commonly used data structures in Python, namely list, dictionary (dict), set (set), and tuple (tuple)

Below is a brief description of their differences and connections

1. Initialization

It has to be said that Python data structures are much simpler to initialize than Java.

List=[]

dict={}

Tuple= (1, 2,)

Set= ([i])

After initialization, the print set result is: {dict}, it can be found that the set is not the value of the

2. Is it orderly

List and tuple are ordered, dict and set are unordered

3. Whether variable

Once a tuple is initialized, it can be accessed as a list by subscript, but cannot be changed, and List/dict/set are mutable.

The set is variable and can be deleted by adding (), remove (), or the intersection of two sets, and the operation of a set

4. Can I have duplicate elements

List,tuple can have

Set can not have duplicate elements

The value of dict can be repeated, but key cannot be

Python Common data structures