Methods whose names start and end with double underscores are special methods (people often call them "dunder" methods). Python calls them automatically in particular situations. Two control how an object turns into text:

__str__ is used by print() and str(): a friendly description for people.
__repr__ is used when an object appears inside a list, in error messages and when debugging: ideally it looks like the code that would recreate the object.

class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y

    def __str__(self):
        return f"({self.x}, {self.y})"

    def __repr__(self):
        return f"Point({self.x}, {self.y})"

p = Point(3, 4)
print(p)
print([p, Point(0, 0)])
print(f"The point is {p}")

Both must return a string, not print one. If you only write one, write __repr__: Python falls back to it when there's no __str__.