Python data Types--lists, tuples, dictionaries, collections

A sequence in Python is a contiguous memory space used to store multiple values, similar to an array in the C language

The commonly used sequence structure is a list, a tuple, a dictionary, a string, a collection, etc.

Unordered sequence: Dictionary, collection

Ordered sequence: list, tuple, string, support bidirectional index (the first element is labeled 0, the last element is labeled-1)

Immutable sequences: strings, tuples

Variable sequence: list, collection, dictionary

First, List

Increase or remove elements from the end of the list as much as possible to increase processing speed significantly

The elements in the list can be different

List of common methods, see the table below, can refer to https://www.cnblogs.com/huangping/p/7730347.html

List.copy () returns the shallow copy of the list element

Python data Types--lists, tuples, dictionaries, collections