How to iterate over class attributes?

I'm looking for a way to not repeat myself in lines 10 to 14. This is always the same code and my real code is more complex. What can I do about this?

01    class MyValues:
02        def __init__(self, a, b, c, d, e):
03            self.a = a
04            self.b = b
05            self.c = c
06            self.d = d
07            self.e = e
08
09    def add_number(values: MyValues, number_to_add):
10        values.a += number_to_add
11        values.b += number_to_add
12        values.c += number_to_add
13        values.d += number_to_add
14        values.e += number_to_add
15        return values

Solution 1:

This would work if all your attributes need to be added:

class MyValues:
    def __init__(self, a, b, c, d, e):
        self.a = a
        self.b = b
        self.c = c
        self.d = d
        self.e = e
        
    # should name the first arg to be self
    def add_number(self, number_to_add):
        for k in self.__dict__:
            setattr(self, k, getattr(self, k) + number_to_add)
        return self

But like @Barmar said you should consider to add them as a list or dict in the first place