How to use the help () and dir () functions in Python

I believe many inexperienced people don't know what to do about how to use the help () and dir () functions in Python. Therefore, this paper summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

Q: tell me about the help () and dir () functions in Python?

Answer: both the help () and dir () functions in Python can be accessed directly from the Python interpreter and used to view the merge dump of the built-in functions.

Help () function: the help () function is used to display document strings and to view usage information related to modules, keywords, attributes, etc.

Dir () function: the dir () function lists all the contents (including functions, methods, classes, variables, etc.) contained in a specified class or module.

Let's talk about the usage of the two separately:

1. If you want to see a detailed description of the usage of a view function, method, or module, you can use the help () function. For example, enter the following command in the interactive interpreter:

Import copyprint (help (copy.copy)) # output result: Help on function copy in module copy:copy (x) Shallow copy operation on arbitrary Python objects. See the module's _ _ doc__ string for more info.None

2. To see all that a string variable (whose type is str) can be called, enter the following command in the interactive interpreter: dir (str)

All the methods provided by the string type (str) are listed above, where methods that begin with "_" and end with "_" are agreed as private methods and do not want to be called directly from the outside.

After reading the above, have you mastered how to use the help () and dir () functions in Python? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!