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- <li><em>date</em>: Fri Jan 28 10:19:00 2005</li>
- <li><em>from</em>: mhirsch at nubridges.com (Michael Hirsch)</li>
- <li><em>subject</em>: [ale] Py[h]hon syntax (sic)</li>
> -----Original Message-----
> From: ale-bounces at ale.org [<a rel="nofollow" href="mailto:ale-bounces";>mailto:ale-bounces</a> at ale.org] On Behalf Of
> Christopher Fowler
> Sent: Thursday, January 27, 2005 6:07 PM
> To: Atlanta Linux Enthusiasts
> Subject: Re: [ale] Py[h]hon syntax (sic)
>
> Here is my WIP code. I'm converting an agent I wrote in perl that
> checks the database for our embedded devices in the field. It then
does
> a ping to see if they are available. The perl agent does more in the
> fact that it will email the admin and also store states in the db. So
it
> will check every 5 minutes on a host and then email the admin every 60
> minutes until the host is back up. The thing I hate about the perl
> agent is that it round robins the list. That is no good so I will
> either convert it to do a fork() on each object or I'll use threads.
Is
> there threads in python? I think in Perl threads are not really
threads
> as they would be in C.
Python has threads.
> chop up this code and tell me how it can be better:
No real comments, just a relevant question to the pythonistas out there.
I notice in this code that there are accessor methods for all the
variables. This is technically unnecessary since python doesn't have
private fields like java or C++. However, perhaps it is good style--in
Java it would be. So, my question is whether this is the preferred way
to expose fields, or is it considered okay to just access the fields
directly?
Michael
>
> --- Cut Here --- Cut Here
----------------------------------------------
>
> #!/usr/bin/env python
>
> import sys;
> import MySQLdb;
> import os;
> import re;
>
> class Ens:
> def set_name(self, name):
> self.name = name;
> def set_id(self, id):
> self.id = id;
> def set_ip(self, ip):
> self.ip = ip;
> def get_name(self):
> return self.name;
> def get_id(self):
> return self.id;
> def get_ip(self):
> return self.ip;
>
>
> def ping(ip, tries = 2):
> my_re = re.compile('(\w|\W)+ (\d) received, (\w|\W)+')
> for attempt in range(tries):
> ping_in, ping_out = os.popen2("ping -c 1 %s" % ip)
> for line in ping_out:
> rec_match = my_re.match(line)
> if not rec_match: continue
> received = int(rec_match.groups()[1])
> if not received: continue
> return attempt + 1
>
> return False
>
>
> class Application:
> def main(self):
> db = MySQLdb.connect(host="127.0.0.1", user="cms", passwd="cms",
> db="AC_OUTPOST");
> c = db.cursor();
> c.execute("select * from ens");
> ENS = [ ];
>
> while True:
> row = c.fetchone();
> if not row: break;
> e = Ens();
> e.set_name(row[2]);
> e.set_id(row[0]);
> e.set_ip(row[5]);
> ENS.append(e);
>
> for tmp in ENS:
> result = ping(tmp.get_ip());
> if not result:
> print "ID:",tmp.get_id()," Name:",tmp.get_name()," DOWN!";
> else:
> print "ID:",tmp.get_id()," Name:",tmp.get_name()," UP!";
>
>
> program = Application();
> program.main();
>
> # vi: set ts=2 sw=2: #
>
> --- Cut Here --- Cut Here
----------------------------------------------
>
> How do I set the object constructor so that I can simply create an Ens
> object with all the information needed? Is it possible to simply pass
> the whole row into the constructor?
>
> I read in the O'reilly book "Learning Python" that the code can be
> compiled into a .pyc file. How do I compile into .pyc so that I can
> distribute the code without the source being seen? This is one of my
> biggest problems with Perl.
>
> Thanks,
> Chris
>
>
> On Thu, 2005-01-27 at 14:49, John P. Healey wrote:
> > the code for pinging would look something like this:
> >
> > import os
> > import re
> >
> > def ping(ip, tries = 2):
> > my_re = re.compile('(\w|\W)+ (\d) received, (\w|\W)+')
> > for attempt in range(tries):
> > ping_in, ping_out = os.popen2("ping -c 1 %s" % ip)
> > for line in ping_out:
> > rec_match = my_re.match(line)
> > if not rec_match: continue
> > received = int(rec_match.groups()[1])
> > if not received: continue
> > return attempt + 1
> > return False
> >
> > it takes an optional second argument (# of tries) and returns the
number
> of
> > tries needed when successful, False otherwise. the SMTP stuff can
be
> handled
> > with smtplib. it's part of the standard library. the main python
site
> has
> > pretty good documentation on this, including example code:
> >
> > <a rel="nofollow" href="http://docs.python.org/lib/module-smtplib.html";>http://docs.python.org/lib/module-smtplib.html</a>
> >
> >
> > 5265762e204a6f686e6e79204865616c6579
> >
> > _______________________________________________
> > Ale mailing list
> > Ale at ale.org
> > <a rel="nofollow" href="http://www.ale.org/mailman/listinfo/ale";>http://www.ale.org/mailman/listinfo/ale</a>
>
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</pre>
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<li><strong><a name="01264" href="msg01264.html">[ale] Py[h]hon syntax (sic)</a></strong>
<ul><li><em>From:</em> cfowler at outpostsentinel.com (Christopher Fowler)</li></ul></li>
<li><strong><a name="01266" href="msg01266.html">[ale] Py[h]hon syntax (sic)</a></strong>
<ul><li><em>From:</em> scherrey at proteus-tech.com (Benjamin Scherrey)</li></ul></li>
</ul></li></ul>
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