Shulou(Shulou.com)06/02 Report--

This article mainly introduces "what is the difference between parameters and arguments in Python development". In daily operation, I believe many people have doubts about the difference between parameters and arguments in Python development. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the question of "what is the difference between parameters and arguments in Python development?" Next, please follow the editor to study!

If you look at some English documents, you may see two words: parameters (sometimes abbreviated as params) and arguments (sometimes abbreviated as args). They all mean parameters in Chinese. So what's the difference between them?

In fact, parameters is the parameter name written in parentheses when we define the function, and arguments is the specific value we pass in when we call the function.

For example:

Def test (name, age=0): print (name, age) test ('kingname', age=1)

Where name and age are called parameters, and kingname and 1 are called arguments.

Excellent practices for using import to import modules

The use of from xxx import * is prohibited under any circumstances.

In most cases, import statements are written at the top of the .py file in the following order:

The standard libraries included in Python are imported first, such as time/os/re and so on.

Installed third-party libraries

Write to the local module in the project yourself

If necessary, to avoid circular import, you can write some import statements in the function.

There is a file a.py that starts with a statement called import b. There is another file, b.py, which begins with the statement import a. There is no problem with writing in this way. As shown in the following figure:

However, if you write from b import walk in a.py, there will be circular references, resulting in an error. As shown in the following figure:

This is because the b.py file is entered when a.py executes from b import walk. At this point, the b.py file executes import a, but because the a.py file is not finished, the b.py execution is not complete, and the walk () function has not yet been defined, so it cannot be imported.

In this case, if you do need such a reference in the code, you can write from b import walk into the say () function so that it can be imported normally, as shown in the following figure:

When importing a module is particularly time-consuming, but it is only executed in a specific function, you can also write import statements in that function.

At this point, the study on "what is the difference between parameters and arguments in Python development" is over. I hope to be able to solve everyone's doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.