CPython C API is one the main culprit in making Python hard to implement and optimize.
As some commenters said, I don't think Python without access to C/C++ projects would be worth right now giving how sloe CPython is. About 100% of machine learning, data science and general science Python code relies on C/C++ extensions.
Current CPython API and the need to keep compatibility reduces the capabilities of improving CPython.
Still happening here. Looks like they changed mediawiki somehow, as the link is not in the latest version of the mediawiki source for that page. Also not happening on other pages.
Tested both on Firefox and Chrome on my machine and on a friend's machine, so no malwares here apparently.
Would be interesting to see the number of lines in those JS and Java repos. I expect JS to be tons of 50 lines 'libraries' and Java to have tons of 50k lines 'libraries'.