Is that really a good comparison?

The PHP code you linked to is basically a class with a bunch of getters and setters.

The Python code, on the other hand, handles numerous real-world HTTP requests that do actual work.

So it's not unexpected that the PHP code is lighter; it doesn't really do anything useful!

Although it helps implement a wiki system, the Python code is still very readable and comprehensible with minimal effort.

I think I know the point that you're trying to make, but those examples surely don't back it up in any way.