if __name__ == "__main__" in Python The Real Reason

if name == "main" in Python The Real Reason | Why we use this in Python

Рет қаралды 3,146

Ай бұрын

Welcome to today's video where we dive into one of the most fundamental concepts in Python programming: _name_ == '__main__'. Understanding this concept is crucial for every Python developer, whether you're a beginner or seasoned coder.
mastering _name_ == '__main__' empowers you to write cleaner, more modular Python scripts that are robust and scalable. Whether you're writing scripts for personal projects or enterprise applications, understanding this fundamental concept will elevate your Python programming skills.
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Пікірлер: 10

@ebraheemelsharkawy3858 Ай бұрын

Helpful, concise, and to the point. Thank you for making this video!

@dan-us6nk Ай бұрын

The ending still isn't clear. What do you mean by "accidentally executing the module while importing it"?

@pratikpal5565 Ай бұрын

Cause you call the function in the same file.

@top5things895 Ай бұрын

When we use if __name__ == '__main__', we are checking whether the current program is being run directly or being imported as a module into another program. If we import the first file into a second one without if __name__ == '__main__', Python will execute the code in the first file without distinguishing whether it is being run as the main program or not. By using if __name__ == '__main__', we ensure that the hello() function is specifically executed only when the first program file is run directly as the main file. I hope this explanation helps clarify the usage and importance of if __name__ == '__main__'

@atmiaesatruemasterisaneter664 Ай бұрын

Thanks man, I always wondered why that exists

@top5things895 Ай бұрын

I'm glad you found it helpful!

@daveit1337 27 күн бұрын

What does __name__ contain when it's run within the imported module?

@top5things895 27 күн бұрын

It will return the name of imported module , let say file1.py contain print(__name__) , then it will print "file1"

@IvanToshkov 17 күн бұрын

Here is my take. This construct is obviously a hack. I can't believe that Guido van Rossum would have designed modules this way if he had included them from the start. So I'd guess that modules in python were a later addition and he designed them in a way that is relatively simple to implement. However, this created the problem that just importing a module would execute any top-level code and this hack was the solution. I'd love to hear the real story behind those and see how far I'm off the target. :)