How Python code is executed.

When you run a Python script, several steps take place behind the scenes to execute your code. Here’s a brief overview of how it works:

Compilation to Bytecode

• When we execute a Python script, the Python interpreter compiles the source code into bytecode.

• Bytecode is a lower-level representation of the code, stored in a .pyc file within the __pycache__ directory.

• During this process, all syntax errors are checked.

• Bytecode instructions are platform-independent and remain the same across different operating systems.

• We can manually generate the bytecode of file Python file using this command. python3 -m py_compile main.py

• We can also execute the generated bytecode.`python3 __pycache__/main.cpython-310.pyc`

Execution by Python Virtual Machine (PVM)

• Once the source code is compiled into bytecode, the Python Virtual Machine (PVM) interprets these bytecode instructions and performs the corresponding actions.

• PVM is a part of Python Interpreter.

Original Post: https://blog.ankitdevelops.tech/how-python-code-is-executed