Erlang and Java both have a much better implemented interpreter. I mean, so much better, CPython in comparison looks like some student with very little knowled

Erlang and Java both have a much better implemented interpreter. I mean, so much better, CPython in comparison looks like some student with very little knowledge of C wrote it. The code makes no attempt at const-correctness, no attempt at minimizing dynamic memory allocation, no attempt at optimizing structures layout... they aren't professional C programmers. They get by by writing crappy code that works somehow. They aren't even in a competition for the best code. Library code in Python is ridiculously bad. By now, it's probably a tradition that instead of solutions it offers workarounds. There's no commonality in how interfaces are structured, things named, arguments to functions are accepted etc. It's a zoo of low quality randomly assembled code. Documentation is also written by people who never cared to be consistent. But not only does it contradict itself between subjects, often the same subject would have plenty of self-contradictory statements simply because the author doesn't know how to think clearly, doesn't know how to express themselves, simply don't understand what they are doing. Every time you read something in documentation, you have to do mental tricks to say "well, it probably doesn't really work like this" or "well, he doesn't really mean it this way" and so on. But, and most importantly: there is no plan, no goal. It's all about randomly adding things and permuting existing ones. There's no reason why new features are introduced. There's no global picture. When stuff gets added, there's no effort to make sure it works with other existing stuff beyond absolute minimum. The language has no taste, no flavor. It's not trying to be the best at anything. It just floats around being the tenth best at best on every metric.