how can I changing a base class method

[voidptr]

Is there some ways to change methods from a base class ?

here an example, I want to change the behavior of extendleft
form deque.

yes I can create a subclass, but I need to rewrite all code that
use deque to Xdeque instead.
Is there a way to change that method instead in the base class ?

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from collections import deque class Xdeque(deque):       def extendleft(self,items):         return super().extendleft(reversed(items))     d = Xdeque() d.extend((4,5,6,7)) d.extendleft((1,2,3)) print(d)

[ichabod801]

I don't believe you can. And if you can, it's would be a bad idea.

[voidptr]

Thanks for this awesome answer !
I agree with you , it is a bad idea, in fact programming in general is a bad idea !