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Python is an interpreted language which means it executes code line by line by the python interpreter .
Python Byte Code
Python compile source code to intermediate byte code . This Byte code generated is low level and platform independent code which executed by python virtual machine means , Byte code can be run at any platform but PVM is required .
Python Virtual Machine
PVM is also called python interpreter . Basically virtual machine is a continuous code loop in which provided byte code is iterated . It is the run engine of python which runs byte code and byte code is not a machine code means cannot run to any of the engine it need specific interpreter called PVM .
Import Mechanism:
Python's import mechanism allows modular programming. Modules are separate files containing Python definitions and statements. The import statement is used to bring modules or their components into the current namespace.