On the one hand, now I really want this for python. On the other, I've made most of these bugs with JS, and very few with python, despite having used it more. So many of them are consequences of JS wats...
Author of the post/rule here. I'd be very curious to see this rule ported/translated to Python! While the gotcha's would probably be different, I suspect it would uncover real bugs. One interesting challenge with JavaScript is that its so ubiquitous that _everyone_ ends up needing to write it at some point. Even those for whom it is a second or third language. I suspect this makes its gotchas all the more common to encounter. Conversely, it makes the value of tools to guide around those gotchas that much more valuable.
My friends are trying to get me to port it, I'll ping you if I do.
Being a common second language is relevant, but JS also has weird truthiness rules and very first-class-feeling lists and hashmaps but not native deep comparisons, and many of the bugs you described stem from this. Those categories of bugs don't exist in Python, that has almost perfect truthiness (PSA: an epoch datetime is falsy! Wat) and deep comparisons by default.
