How to use special variables in different modules of Python

Editor to share with you how to use special variables under different modules 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!

1. When the module (source file) runs as the main program, the interpreter assigns the hard-coded string "_ _ main__" to the _ _ name__ variable.

# It's as if the interpreter inserts this at the top# of your module when run as the main program.__name__ = "_ _ main__"

2. When the module is imported by another, the name in the import statement is assigned to the _ _ name__ variable.

Suppose some other module is the main program and it imports your module. This means that there are statements like this in the main program or other modules imported by the main program:

# Suppose this is in some other main program.import foo

The interpreter will search your foo.py file (and some other variants) and before executing the module.

# It's as if the interpreter inserts this at the top# of your module when it's imported from another module.__name__ = "foo" above is all the content of this article entitled "how to use special variables in different modules 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!