The language + standard library + C API references are around 2392 pages, not counting the other minor documentation like the 500 PEPs, release notes and differences across each Python release, even minor ones.
Then there is the whole set of meta-classes, decorators, mixins, generators, operator overloading, multiple inheritance, abstract classes, fp like programming and much more.
The big difference to C++, is that the community doesn't care about performance, leaving the PyPy guys a Quixotic battle regarding adoption, which isn't the case with C++ compilers.
Even C isn't as simple as many think, with its 200+ documentated cases of UB, and the days that C mapped 1:1 to PDP 11 Assembly are long gone.
How C code looks like, and what gets generated via auto-vectorization, GPGPU code, SIMD intrisics are very much two worlds appart.