*Advanced*
> Can use advanced Python libraries like numpy, pandas, matplotlib.
You're a data scientist and this is not "Python".
> Can use regular expressions for pattern matching in strings.
Not Python really again.
> Understands and uses Python's memory management and optimization techniques.
Wait, like thinking about how a `list()` looks like from the (false) C-level perspective? Can you fix my CPU transistors while you're at it? (yes, /s)
*Experts*
> Can use Python's C API to extend Python with C/C++ code.
Do you mean whatever FFI Python has? Otherwise this is like asking your mechanic to also make it a plane, and a submarine. After all these are all just vehicles.
> Understands and uses Python's garbage collection system.
Ref counting? Wait what?
> Have a good understanding of Python's internals, such as bytecode, the Python interpreter's execution model, and how Python's data types are implemented at the C level.
Submarine :D
My perch also lets me see here the aspects I usually don't care about. Thank you!