iMom0 imom0

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。

	def prime_generator():
	_primes = [2]
	current = 3
	while True:
	if all(current % prime != 0 for prime in _primes):
	_primes.append(current)
	yield current
	current += 1

	; ~/.pip/pip.conf
	[global]
	use-mirrors=true
	mirrors=http://e.pypi.python.org
	index-url=http://e.pypi.python.org/simple

	def slugify(value):
	"""
	Normalizes string, converts to lowercase, removes non-alpha characters,
	and converts spaces to hyphens.

	Took from django sources.
	"""
	value = Markup(value).striptags()
	if type(value) == unicode:
	import unicodedata

	# url http://stackoverflow.com/questions/13447226/count-how-many-times-a-part-of-a-key-appears-in-a-dictionary-python

	from collections import Counter
	from itertools import chain

	a = { (1,2):3, (1,3):5, (2,1):6 }

	# first
	# nested iter, order is important
	Counter(j for k in a for j in k)

	{
	"meta": {
	"limit": 3,
	"next": "/myapp/comment/comment/?note=1&offset=3&limit=3&format=json",
	"offset": 0,
	"previous": null,
	"total_count": 4
	},
	"objects": [
	{

	<!doctype html>
	<meta charset="utf-8">
	<style>
	svg {
	font: 10px sans-serif;
	}
	</style>
	<body>
	<script src="http://d3js.org/d3.v3.min.js"></script>

	In [1]: %paste
	import sys
	import logging

	PROGRESS = 1000

	class MyLogger(logging.Logger):

	PROGRESS = PROGRESS
	LOG_FORMATTER = '%(asctime)s - %(levelname)-10s - %(funcName)s - %(message)s'

	var FindProxyForURL = function(init, profiles) {
	return function(url, host) {
	"use strict";
	var result = init, scheme = url.substr(0, url.indexOf(":"));
	do {
	result = profiles[result];
	if (typeof result === "function") result = result(url, host, scheme);
	} while (typeof result !== "string" \|\| result.charCodeAt(0) === 43);
	return result;
	};