How to analyze the problem of Python slicing

This article introduces you how to parse Python slice problems, the content is very detailed, interested friends can refer to it, I hope it can help you.

In mathematics, a sequence is also called a sequence, which refers to a sequence of numbers sorted in a certain order. Sequences are the most basic data structure in Python. It is used for a contiguous memory space for storing multiple values. Python has five commonly used sequence structures built in. They are lists, tuples, dictionaries, sets, and strings. Let's look at the basic operations of these sequence structures today.

Each element of the sequence has a number, also known as an index, which starts at 0. The index 0 indicates the first index.

The magic of Python compared to other languages is that its index can be negative, counting from right to left. That is, counting from the last element. The last index is-1 and the penultimate index is-2. And so on.

Note: When negative numbers are used as indexes, they start at-1. rather than starting from zero. That is, the last element subscripts-1. This is to prevent coincidence with the first element.

Slicing is another way of accessing sequence elements. It can access a range of elements, and a new sequence can be generated by slicing.

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