3. Python Program Execution Explained | How Python Code Runs Behind the Scenes

Published: 17 September 2025
on channel: Codelogits Academy

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Ever wondered what happens behind the scenes when you run a Python program? In this tutorial, we’ll break down the complete Python program execution process step by step.

You’ll learn:
How to execute Python programs from the terminal (`python filename.py` / `python3 filename.py`)
How program execution works in PyCharm and other IDEs
What exactly happens when you run a Python file behind the scenes
The role of the Python Interpreter, Compiler, and PVM (Python Virtual Machine)
How Python translates high-level code into bytecode (.pyc files)
Why Python is called a hybrid language (both compiled and interpreted)
The concept of platform independence and why Python bytecode runs on any machine
How memory usage (RAM vs Hard Disk) plays a role in execution
Demonstration of generating and running `.pyc` files with `py_compile`

By the end of this video, you’ll have a solid understanding of how Python truly executes your code—from source file to final output.

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