Luo Wenyang

Cool idea, but how are the following cases handled: 1. cfg1 has additional key/value mapping than cfg2 2. cfg1 has missing key/value mapping that is present in cfg2

I believe the intuitive semantics for `cfg1.diff_from(cfg2)` is `cfg1 - cfg2` , meaning "how `cfg1` differs **from** `cfg2`". In other words, the method should give us the change **from** `cfg2`...

It seems that ".".join(key_list) does not accept integer as list element. The same is observed when the config is read from file which contains integer as key. Maybe it should...

That sounds reasonable because the $n-1$ form makes it possible for $\exp(K_i)V_i$ to appear in the expression of $O_{i+1}$. However, it would be better if someone could provide some empirical...