Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.freenet.ag!news2.euro.net!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=WxUl7K+eMCZtOOBeR9rZh4t6J6hQ30McQY1Bn/xZ6rGI4j2lSrPigHc6Ti7MrVnUTByhJN2HutuhJwdmkbUSOHzqyXfuiViKIMM4F7NNcIifTsHES3VTvGIVVSsUvofMHNrP6fkaNOIqq5vWrH1uSfMTjbc06YteIJKn3Uw2eyE=;
References: <CAFLxTvm4ytk5nRn0bxYegagkidRsXxJp2jPa=mP_o2DJUsxrkA@mail.gmail.com>
Date: Sat, 5 Jan 2013 14:34:38 -0800 (PST)
From: chaouche yacine <yacinechaouche@yahoo.com>
Subject: Re: Python programming philosophy
To: Nac Temha <naccttemha@gmail.com>, "python-list@python.org" <python-list@python.org>
In-Reply-To: <CAFLxTvm4ytk5nRn0bxYegagkidRsXxJp2jPa=mP_o2DJUsxrkA@mail.gmail.com>
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="329289550-1750537997-1357425278=:40939"
Precedence: list
Reply-To: chaouche yacine <yacinechaouche@yahoo.com>
Newsgroups: comp.lang.python
Message-ID: <mailman.153.1357425282.2939.python-list@python.org>
Lines: 51
NNTP-Posting-Host: 2001:888:2000:d::a6
Xref: csiph.com comp.lang.python:36219

--329289550-1750537997-1357425278=:40939
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable

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 transfor=
m that AST into a control flow graph, and finally a bytecode is produced ou=
t of that control flow graph. The pyc files you see are this bytecode, so t=
hey are produced at the end. Anytime you edit your .py file, a new .pyc fil=
e 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.=0AJust 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 i=
ssues are handled by the virtual machine.=0A=0A=0A=0A______________________=
__________=0AFrom: Nac Temha <naccttemha@gmail.com>=0ATo: python-list@pytho=
n.org =0ASent: Saturday, January 5, 2013 11:05 PM=0ASubject: Python program=
ming philosophy=0A=0A=0AHello,=0A=0A=0A=0AI want to learn working principle=
 of python as broadly. How to interpret the python? =A0For example, what is=
 pyc files and when does it occur?=0ACan you explain them? Thanks in advanc=
e.=0A-- =0Ahttp://mail.python.org/mailman/listinfo/python-list
--329289550-1750537997-1357425278=:40939
Content-Type: text/html; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable

<html><body><div style=3D"color:#000; background-color:#fff; font-family:ti=
mes new roman, new york, times, serif;font-size:12pt"><div>The compiler rea=
ds 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, w=
hich 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 contro=
l 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.</div><div><br></div>Just lik=
e with java, this allows you to write a single .py file that can work on an=
y platform without changing the source file, because all the cross platform=
 issues are handled by the virtual machine.<br><div style=3D"color:
 rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times=
,serif; background-color: transparent; font-style: normal;"><br></div><div =
style=3D"color: rgb(0, 0, 0); font-size: 13px; font-family: arial,helvetica=
,sans-serif; background-color: transparent; font-style: normal;"><br>______=
__________________________<br> From: Nac Temha &lt;naccttemha@gmail.com&gt;=
<br>To: python-list@python.org <br>Sent: Saturday, January 5, 2013 11:05 PM=
<br>Subject: Python programming philosophy<br><br><br>Hello,<br><br><br><br=
>I want to learn working principle of python as broadly. How to interpret t=
he python? &nbsp;For example, what is pyc files and when does it occur?<br>=
Can you explain them? Thanks in advance.<br>-- <br><a target=3D"_blank" hre=
f=3D"http://mail.python.org/mailman/listinfo/python-list">http://mail.pytho=
n.org/mailman/listinfo/python-list</a></div> </div></body></html>
--329289550-1750537997-1357425278=:40939--