ericdouglas

// 4 spaces to 2 spaces
%s;^\(\s\+\);\=repeat(' ', len(submatch(0))/2);g

// Tab to 2 spaces
:%s/\t/  /g

MLnick

import spark.SparkContext
import SparkContext._

/**
 * A port of [[http://blog.echen.me/2012/02/09/movie-recommendations-and-more-via-mapreduce-and-scalding/]]
 * to Spark.
 * Uses movie ratings data from MovieLens 100k dataset found at [[http://www.grouplens.org/node/73]]
 */
object MovieSimilarities {

jrydberg

class UnhandledExceptionError(Exception):
    """The exception could not be handled by the supervisor."""


class SupervisorKilledError(Exception):
    """The supervisor was killed."""


class SupervisorAbortedError(Exception):
    """The supervisor gave up after maximum number of failures."""

onlytiancai

python项目通用组件和基础服务

很多公司都大量使用了python，其中有一些开发规范，code guidline， 通用组件，基础框架是可以共用的。

每个公司都自己搞一套, 太浪费人力，我想开一帖和大家讨论一下这些python基础设施的搭建。

原则是我们尽量不重新发明轮子，但开源组件这么多，也要有个挑选的过程和组合使用的过程，在这里讨论一下。

另一方面，有些开源组件虽然强大，但我们不能完全的驾驭它，或只使用其中很少的一部分，我们就可以考虑用python实现一个简单的轮子，可控性更强，最好不要超过300行代码。

goodwillcoding

class JsonSerializableMixin(object):
    """
    Converts all the properties of the object into a dict for use in json.
    You can define the following as your class properties.

    _json_eager_load :
        list of which child classes need to be eagerly loaded. This applies
        to one-to-many relationships defined in SQLAlchemy classes.

    _base_blacklist :

methane

#! /usr/bin/python
# coding: utf-8

"""Copy table from mysql to sqlite.

Require:
* SQLAlchemy
* MySQLdb or PyMySQL

Usage:

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

dmitric

class Backend(object):
  def __init__(self):
    engine = create_engine("mysql://{0}:{1}@{2}/{3}".format(options.mysql_user, options.mysql_pass, options.mysql_host, options.mysql_db)
                            , pool_size = options.mysql_poolsize
                            , pool_recycle = 3600
                            , echo=options.debug
                            , echo_pool=options.debug)
    self._session = sessionmaker(bind=engine)
  
  @classmethod

ghoseb

from gevent import monkey; monkey.patch_all()
import gevent
import gevent.greenlet
from functools import partial
from random import random

import urllib
import urllib2

def on_exception(fun, greenlet):