Few typos noticed in one Lecture Object Oriented Programming

[ilicdragana]

Hi @ShrRa
I have noticed a typo "star = Variable(obj_id')" in the part describing dunder Methods, the example of the class Variable description.

Thanks!

[ilicdragana]

Also, @ShrRa please check the box "Properties" after this exercise: https://shrra.github.io/python-intermediate-development/35-object-oriented-programming/index.html#exercise-useful-methods-for-the-variable-class

the code line states: np.mean(self.lc['mags']) --> np.mean(self.lc['mag']) ?