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Editor to share with you what are the practical functions and features of Python, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Functions with any number of arguments

You may already know that Python allows you to define optional parameters. But there is another way to define any number of parameters of the function.

First, take a look at an example that defines only optional parameters

Now, let's look at how to define a function that accepts arbitrary arguments. We use tuples to do this.

Use Glob () to find the file

Most Python functions have long and descriptive names. But you may not know what a function named glob () does unless you are already familiar with it from somewhere else.

It looks like a more powerful version of the listdir () function. It allows you to search for files by using pattern matching.

You can find multiple file types like this:

If you want to get the absolute path to each file, you can call the realpath () function on the return value:

Debug

The following example uses the inspect module. This module is very useful for debugging purposes and has far more functions than is described here.

This article will not cover every detail of this module, but will show you some use cases.

Generate a unique ID

In some cases you need to generate a unique string. I see a lot of people using the md5 () function to do this, but it's really not for that purpose.

There is actually a Python function called uuid () that is used for this purpose.

You may notice that even though strings are unique, the characters that follow them look similar. This is because the generated string is associated with the MAC address of the computer.

To reduce repetition, you can use these two functions.

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Serialization

Have you ever needed to store a complex variable in a database or text file? You don't need to think of a strange way to convert an array or object lattice into a formatted string, because Python already provides this feature.

This is a native Python serialization method. However, JSON has become popular in recent years, and Python has added support for it. Now you can use JSON to encode and decode.

This is more compact and, most importantly, compatible with JavaScript and many other languages. However, for complex objects, some of the information may be lost.

Compressed character

When talking about compression, we usually think of files, such as ZIP structures. Long characters can be compressed in Python without involving any archive files.

Register the Shutdown function

If you want to measure some benchmark data at the end of script execution, such as how long it takes to run:

It looks simple at first glance. You just need to add the code to the bottom of the script, and it will run before the script ends. But if there is a fatal error in the script or if the script is terminated by the user, it may not run.

When you use atexit.register (), your code will be executed, no matter what reason the script stops running.

These are all the contents of the article "what are the practical functions and features of Python". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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