The compiler reads your source code and parses it into parse trees. This is
first step. It then takes the parse trees and transform them into abstract
syntax trees, which are like a DOM tree in an HTML file, and then transform
that AST into a control flow graph, and finally a bytecode is produced out of
that control flow graph. The pyc files you see are this bytecode, so they are
produced at the end. Anytime you edit your .py file, a new .pyc file is created
if you invoke the python interpreter myfile.py on the former. If your .py file
doesn't change, the .pyc file stays the same.
Just like with java, this allows you to write a single .py file that can work
on any platform without changing the source file, because all the cross
platform issues are handled by the virtual machine.
________________________________
From: Nac Temha <nacctte...@gmail.com>
To: python-list@python.org
Sent: Saturday, January 5, 2013 11:05 PM
Subject: Python programming philosophy
Hello,
I want to learn working principle of python as broadly. How to interpret the
python? For example, what is pyc files and when does it occur?
Can you explain them? Thanks in advance.
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