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Defining Main Functions in Python

A Basic Python main() In some Python scripts, you may see a function definition and a conditional statement that looks like the example below: Python. def main (): print ("Hello World!") if __name__ == "__main__": main Copied! ... For example, you may have a script that does the following: Reads a data file from a source that could be a database, a file on the disk, or a web API;

https://www.geeksforgeeks.org/python-main-function/

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Python Main Function - GeeksforGeeks

When the interpreter reaches the if statement it checks for the value of name and when the value of if is true it runs the main function else the main function is not executed. Main function as Module. Now when we import a Python script as module the . __name__. variable gets the value same as the name of the python script imported. Example:

https://stackoverflow.com/questions/22492162/understanding-the-ma...

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Understanding the main method of python - Stack Overflow

The Python approach to "main" is almost unique to the language(*). The semantics are a bit subtle. The __name__ identifier is bound to the name of any module as it's being imported. However, when a file is being executed then __name__ is set to "__main__" (the literal string: __main__).. This is almost always used to separate the portion of code which should be executed from the portions of code which define functionality.

https://python-tutorials.in/python-main-function-method-example-u...

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Python Main Function & Method Example: Understand def Main()

Decoding the Role of def main() in Python: A Comprehensive Guide with Examples Introduction: In Python programming, the def main() function plays a crucial role, serving as the entry point for executing code when a Python script is run. Understanding how to utilize def main() enhances code organization, readability, and modularity. This blog post delves into the significance of the def main() function, providing insights and examples to illustrate its usage.. Understanding def main():. In ...

https://www.programiz.com/python-programming/main-function

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Python Main function - Programiz

Learn how to use the main() function and the __name__ variable to define the execution point of a Python file. See examples of running a Python file as a script or a module and how to use if conditional with __name__ to run different code.

https://www.softwaretestinghelp.com/python/python-main-function/

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Python Main Function Tutorial with Hands-on Examples

What is Python Main function - There is a special function in Python that helps us to invoke the functions automatically by operating the system during run-time or when the program is executed, and this is what we call as the main function. ... A Complete Overview of Python Main Function with Examples: Python File Handling was explained in detail in our previous tutorial in the series of Free Python tutorials.

https://learnpython.com/blog/write-main-function-python/

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How Do You Write a Main Function in Python? - LearnPython.com

We’ll start with a basic example to demonstrate how you can separate executable code in your module. Then, we’ll move to a more complex example, where we’ll define a main() function. Example 1. Separating executable code. Let’s say we are developing a game that only people aged 18+ are allowed to play.

https://docs.python.org/3/library/__main__.html

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__main__ — Top-level code environment — Python 3.13.3 documentation

In Python, the special name__main__ is used for two important constructs: the name of the top-level environment of the program, which can be checked using the__name__ == '__main__' expression; ... If a module like this was imported from a different module, for example to unit test it, the script code would unintentionally execute as well. This is where using the if __name__ == '__main__' code block comes in handy. Code within this block won’t run unless the module is executed in the top ...

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Python Main Function and Examples with Code - Interview Kickstart

Execute the script: Save your Python script with a .py extension and execute it using the Python interpreter. The code inside the main() function will be executed. python your_script.py. How to Call Main Function in Python. In Python, defining and calling the main method can be done in two ways. Let’s explore both of these implementations:

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Python main function Examples - AskPython

We have to use an alternative approach to implement the Python main function. Whenever we execute a Python script, its scope is set to __main__ and it can be retrieved by __name__ variable. But, when the script is imported as a module, the scope value is set to the name of the python script. We can use the scope name with the if statement to ...

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