why are you returning the whole object while you don't need it?

[MTayyabSaeed]

Machine-Learning/LinearRegression/LinearModel.py

Line 53 in 5b2d8a7

return self

I have checked without returning the object and there is no need until you'll assign it to to the values of w_ and cost_. Even if you need to return it you just to return those attributes instead of the whole object.