What are some advanced Python interview questions?

What are some advanced Python interview questions I should prepare for?

Some advanced Python interview questions include:

1. Explain the Global Interpreter Lock (GIL).
2. What are decorators and how do you use them?
3. Can you explain the difference between deep copy and shallow copy?

Can you elaborate on decorators?

Sure! Decorators are a way to modify or enhance functions or methods in Python. They are often used for logging, enforcing access control, or instrumentation. A decorator is a function that takes another function as an argument and extends its behavior without explicitly modifying it.

How does the Global Interpreter Lock (GIL) affect multi-threading in Python?

The GIL is a mutex that protects access to Python objects, preventing multiple threads from executing Python bytecode simultaneously. This means that even in multi-threaded programs, only one thread can execute Python code at a time, which can be a bottleneck for CPU-bound programs.

What is the difference between deep copy and shallow copy?

A shallow copy creates a new object but inserts references into it to the objects found in the original. A deep copy creates a new object and recursively adds copies of nested objects found in the original, meaning changes to nested objects in the copy won't affect the original.