The one thing I miss in Python is the inability to click "view source" in my web browser to see how a core Python library is implemented. PHP also has this problem. (Code is the best documentation. Learn to read it.)
The only thing I wish they had was a way to pipe it through a highlighter like perltidy with html out. That'd probably just lead to holy wars on formatting/colours though.
For eg. https://metacpan.org/source/DRAEGTUN/Builder-0.05/lib/Builde...
It's not as comprehensive and shiny as the core Python docs, but along with the tutorials and examples, it's actually pretty decent.
Also, I never used a popular Python library for which I haven't found good resources.
My favorite Python library, called NLTK, which has no equivalent in PHP or Ruby or any other platform for that matter, comes with a freaking book that's available for free.