mikhail

Backup & Restore MySQL <-> AWS S3

Based on https://gist.github.com/2206527 this script loops through databases and tables and creates individual files that are uploaded to S3.

mikhail

Yielding a list of tasks in Tornado 4.0

Note: This behavior has changed in Tornado 4.1

Executing python yield_all.py will produce results similar to:

$ python run_all.py
one is sleeping
two is sleeping

mikhail

Python's scope

Python's scope of variables should be intuitive, but for those that don't find it as such here's a quick example.

In the file below scope.py I create a dummy class Temp() which prints some debug text when its created and destroyed.

$ python scope.py
Initiating quick
Destroying quick

mikhail

Python Generators and Yielding

In python yield can be used to transfer information in both directions.

yield 'hello'

will generate (vs return) the string "hello", whereas

mikhail

Helper scripts for git

When working with forks & branches for features and pull requests I often find myself needing common actions, like

1. Create a new branch, and I don't care what it's named
2. Update the last commit, and keep the commit message
3. List all the branches I have with some description of what that branch is

Below are the scripts to do just that.

mikhail

Doing a proper version release requires documenting all the things you've changed. Frequently CHANGELOG.md is used for these purposes.

Unless you are maintaining that file throughout the changes it can become a hassle. Luckily you can leverage GitHub's issue tracking and PR system to manage that for you. If you use GitHub's milestones like you would versions then you have all the data there for you. However, you're stil left with the collection and formatting of the changes.

The script below automatically grabs that data for you and creates a markdown output. I've been successfully using it for our Kingpin project for several releases. Here's the sample use:

$ ./get_changelog Nextdoor/kingpin 0.2.0
## Version 0.2.0
 * #174: Add actor 'initialization context' support. ([@diranged])

mikhail

#!/usr/bin/env python
import logging
import md5
import optparse
import os
import re
import subprocess
import sys

from wordpress_xmlrpc import Client, WordPressPost

mikhail

The two functions (akt and mkvin) in this gist allow for a quick way to create end activate python's virtual environments

mkvin will create a new virtual environment in $HOME/virtualenvironments directory with the name of the directory you're in.

For example:

[mikhail@MadRussian git]$ mkdir projectzero
[mikhail@MadRussian git]$ cd projectzero
[mikhail@MadRussian projectzero]$ mkvin

mikhail

FROM python:2.7
MAINTAINER Mikhail Simin
ENV USE_REDIS true
ENV USE_SLACK true

ADD alphabot /app/alphabot
RUN pip install -e /app/alphabot

ADD requirements.txt /app/requirements.txt
RUN pip install -r /app/requirements.txt

mikhail

def is_pal(some_int):
    reverse = list(str(some_int))
    reverse.reverse()
    reverse = int(''.join(reverse))
    return some_int == reverse

def main():

    start = 999