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I have seen programs with the dunder method's __init__/__main__. I have no idea what they do, can anyone help me?

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  • I'm almost sure that you did not search this question before asking. – NoDataDumpNoContribution Feb 01 '21 at 06:41
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1 Answers1

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__init__:

The init method is similar to a constructor in other languages. It initializes your class. Example:

class Foo:
  def __init__(self):
     self.bar = "Foobar"

As you can see, I am initializing a new class Foo, saying that Foo has a field called bar within the __init__ method.

__main__:

__main__ is the name of the scope in which the top level executes. This is why you commonly see this in Python code:

if __name__ == "__main__":
    main()

This means that the __name__ returns to say that yes, we are running this as a script (example: python3 main.py).

Henry
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