whiat is different between function conj(x) and method x.conj() python

Question

I know conj(x) and x.conj() do the same thing, but what is the main difference?. Is that we can do any function as method such as sum(x) written as x.sum()?

Answer 1

If you are creating your own class you can define a method to use the built in function:

class Example(list):
    def sum(self):
        return sum(self)

x = Example((1,2,3))
print(x.sum())

Although there is no direct way to make this functionality available to built in types like list itself.