amcgregor

Application Management Server

Web-based interface (w/command-line tools) for managing:

1. Application server configuration.
   1. SSH keys, etc.
2. Application installation.
   1. Drop a .zip (or .egg, more on this below) into a folder.
   2. Upload the same via web interface.
   3. Enter the URL of a SCM system for checkout and deployment.

amcgregor

FHS-Based Python Web Application Deployment

The following is based off of one client application deployment scenario, with all of the files described herein managed in a Git repository.

This is NOT a proposed standard; if this is used at all, it’ll be used at the application server level and will be transparent to the underlying (embedded/mounted/mapped/attached/installed) application.

1. /home/<user>/apps/<application>/ — Git Root
   1. .gitignore — Ignore almost everything.
   2. README.textile — Fancy GitHub notice.
   3. restart — Progressive upgrade / roll-out script. This and the start/stop scripts, below, are venv aware and do not require the venv to be active.

amcgregor

from datetime import datetime
import logging
from marrow.mailer import Message, Delivery
logging.basicConfig(level=logging.DEBUG)

mail = Delivery({
        'manager': 'futures',
        'manager.workers': 10,
        'transport': 'smtp',
        'transport.host': 'secure.emailsrvr.com',

amcgregor

"""Marrow Mailer integration sample for Pyramid.

For information on Mailer, see:

    https://github.com/marrow/marrow.mailer#readme

Delivery methods include: Google AppEngine, IMAP, log, maildir, mbox, sendmail,
Amazon Simple E-Mail Service, and SMTP.

"""

amcgregor

Enumerated Bitfield Data Type

If it’s worth doing once, it’s worth writing a system to do it.

So I’m exploring writing a DNS server in Python, and while there are a number of solutions for reading and writing DNS data in a variety of formats (such as BIND configuration files, over-the-wire encoding, etc.) I learn best by doing, not by using someone else’s code. Calling it “not invented here” is naïve at best, so let’s get started with the first over-engineered bit I’ve written.

Flags

DNS is a binary protocol, which is a seriously good thing compared to protocols such as SMTP, NNTP, POP, and IMAP. It makes rather extensive use of bit masks to represent flags, thus we’ll need a method to encode and decode these bit masks, and a convenient way to display them in a human-readable way. Also attached to this Gist is a copy of the flags.py file from the dnspython package, a quite complete and mature package by any standard. Unfortunately, it followed in twisted.names’ footsteps. If you exam

amcgregor

• processes (default 1) – number of processes to spawn (0 or None to autodetect cores)
• respawn (default True) – automatically re-spawn dead slaves in a multi-process environment
• cwd – change current working directory during daemonization
• detach (default None; autodetect) – detach from the terminal when daemonizing
• files
  • preserve (default []) – fileno() descriptors to avoid closing
  • stdin (default os.devnull)
  • stdout (default os.devnull)
  • stderr (default os.devnull)
• pid

amcgregor

class Service(object):
    """Example service.
    
    Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
    tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim
    veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea
    commodo consequat. Duis aute irure dolor in reprehenderit in voluptate
    velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
    cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id
    est laborum.

amcgregor

Cleaned IRC log of #python starting Monday, 25 July, 2011 at 17:13:55 EDT.

Gems are highlighted in bold.

GothAlice	How do I determine if a given object is a @classmethod, and, additionally, how do I determine if it is a @staticmethod? 1
KirkMcDonald	GothAlice: Why would you care?
GothAlice	KirkMcDonald: Enforcing interfaces, not that it matters.
dash	GothAlice: you’re right, it doesn’t matter
_habnabit	GothAlice, if you wanted an answer to the question as asked, why don’t you try ##python-friendly? #python is about writing better code.
nedbat	GothAlice: what KirkMcDonald should have said was, “The Python culture is to not check ahead of time, do you have an unusual requirement that means you really have to know?”

amcgregor

# encoding: utf-8

import re

from functools import wraps
from collections import namedtuple


re_type = type(re.compile(""))

amcgregor

import types

class IFile(object):
    pass

class ResponseRegistry(object):
    def __init__(self):
        self.registry = list()
    
    def register(self, *kinds):