How to understand Python slices

In the process of using Python to solve various practical problems, we often encounter the situation of extracting partial values ​​​​from an object. The slicing operation is specifically used to complete this operation. powerful weapon. Theoretically, as long as the conditional expression is appropriate, any target value can be obtained through a single or multiple slicing operations. The basic syntax of slicing operations is relatively simple, but if the internal logic is not thoroughly understood, errors can easily occur, and such errors are sometimes hidden deep and difficult to detect. This article summarizes various situations of slicing operations through detailed examples.

The indexing method of Python's sliceable objects

includes: Positive index and negative index parts, as shown in the figure below, with a = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9] as an example:

Detailed example of Python slicing operation

The following examples take the list a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] as an example:

Cut the complete object

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