How to Create a Main Python Program?

Estimated read time 2 min read

A main Python program is the entry point of your application. It’s the script that gets executed when you run your Python program. Here’s how you can create a simple main Python program:

  1. Create a new Python file with a .py extension. For example, main.py.
  2. Define the code you want to execute when the program runs. This could include functions, classes, or other code.
  3. Add a if __name__ == '__main__': block to your code. This block will ensure that the code inside it only runs when the program is executed as the main program, and not when it’s imported as a module by another program.

Here’s an example of a main Python program:

def greet(name):
    print(f'Hello, {name}!')

if __name__ == '__main__':
    greet('Alice')

In this example, we define a simple greet function that takes a name as input and prints a greeting. We then add an if __name__ == '__main__': block that calls the greet function with the name Alice.

When you run this program from the command line using python main.py, it will print the greeting Hello, Alice!.

You can add more code to your main program, such as reading input from the user, calling other functions, or importing modules. The if __name__ == '__main__': block ensures that this code only runs when the program is executed as the main program, and not when it’s imported as a module by another program.

You May Also Like

More From Author

+ There are no comments

Add yours

Leave a Reply