Frame_object

Each of function call is also called frame and each function has own frame and stack

_frame

PyFrameObject

the python interpreter maintain threads as PyThreadStates. Each PyThreadState keeps track of the top of its stack the stack is just a linked list of PyFrameObject PyFrameObject is the basic unit of bytecode evaluation Each frame uses its own stack to perform code execution

https://www.youtube.com/watch?v=smiL_aV1SOc https://www.youtube.com/watch?v=cSSpnq362Bk