Why cant we use dunder methods outside a class in Python ?

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I am a begineer with Python and I was wondering why cant we use the dunder method outside a class ? or maybe I am doing it wrong and not aware of any method.

What I have tried:

Google and other online resources

Posted 24-Sep-20 2:55am

deepeshdm3434

Updated 24-Sep-20 3:59am

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CPallini · Answer 1 · 2020-09-24T03:38:00

Solution 1

You may use them outside (if I got you):

Python

class Foo:
  
    def __str__(self):
      return "a foo"

f = Foo()
print( f.__str__())

Posted 24-Sep-20 3:38am

CPallini

Richard MacCutchan · Answer 2 · 2020-09-24T04:00:00

Solution 2

See The Python Tutorial — Python 3.7.9 documentation[^].

This works fine:

Python

def __foobar__():
    print("foobar")

__foobar__()

Posted 24-Sep-20 4:00am

Richard MacCutchan

Updated 24-Sep-20 4:36am

v2