Oct. 11, 2018
1:15 p.m.
https://en.wikipedia.org/wiki/Liskov_substitution_principle https://en.wikipedia.org/wiki/Don%27t_repeat_yourself
I did an internet search for: python liskov (over the past year). The first result was a Ruby page (but principle probably the same) https://www.netguru.co/codestories/solid-principles-3-lsp The second result was "Incompatibile signature with supertype" https://github.com/python/mypy/issues/4250 And the code example was class FrozenDict(MutableMapping): # code So there's prior Python art for FrozenDict and Liskov inheritance. -- Jonathan