Cannot subclass Chart

[someidiot]

I get stack overflow when trying to extend the Chart class due to the way the superclass is called in Chart.init. Using self.class causes problems, see http://stackoverflow.com/questions/18208683/when-calling-super-in-a-derived-class-can-i-pass-in-self-class

[atodorov]

@someidiot - this is an easy fix but can you post a reproducer so I can make a test for this.

The SO thread sounds about right but I've had the habit of using self.__class__ for quite a long time and haven't seen such problems. It bugs me I may have been doing it wrong the whole time and I want to investigate in details. Thanks.

[atodorov]

FYI I have also sent a PR to pylint for this error. It looks like they also had a regression in detecting super(type(self)) but that's another story, see pylint-dev/pylint#1109

[someidiot]

Awesome, thanks