The virtual machine used in CPython is stack-based, meaning that its operation relies on stack data structures. CPython uses three types of stacks:
- The call stack, which holds an entry, known as a frame, for every function call in the program. When a function call returns, it is popped off the call stack.
- An evaluation stack for each frame in the call stack, where function execution occurs. Executing code involves pushing objects to this stack, manipulating them, and popping them.
- The block stack, used to keep track of certain control structures like loops or try/except blocks.

Stack-Based Virtual Machine

CPython is the standard implementation of the Python language. It is written in C. Likewise, CPython's standard library is written in a mixture of C and Python. The CPython interpreter encompasses the compilation to byte code and the virtual machine that reads the byte code. There are alternative implementations of Python, but CPython is the one that is provided when downloading Python from the official website.

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Python is an interpreted language, meaning that code written in the language is not converted into machine-readable code, but instead byte code. This byte code is then translated by an interpreter called the Python Virtual Machine whenever the program runs. On the fly, the interpreter translates the byte code into machine-readable into code that the CPU executes.

Interpretation

Geeks for Geeks is a website that offers information on a variety of programming languages, tips for coding interviews, and ideas for programming projects:  https://www.geeksforgeeks.org/python-programming-language/

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