I think this article sucks, but of course they are right; by far most real world code is horrible. That goes for academic as well by the way; I cringe when I see the code people get As & Bs for in universities. "It has to work" they say and the prof seems to agree. So you can see, yes also in Python, the most incredible constructions which 'work' but are hardly real code and do not work outside of the required examples.

Code in real world companies is mostly horrible, especially when the company gets bigger and older. Spolsky has a bunch of articles about that. To counteract or prevent that you need heaps of money put into it and most companies really don't see the need or actually don't have the funds.