lbolla

import sys
import tornado.ioloop
import psycopg2
import psycopg2.extensions

io_loop = tornado.ioloop.IOLoop.instance()
conn = psycopg2.connect('dbname=mytest user=lbolla password=secret')
conn.set_isolation_level(psycopg2.extensions.ISOLATION_LEVEL_AUTOCOMMIT)

santiagobasulto

Time complexity

This page documents the time-complexity (aka "Big O" or "Big Oh") of various operations in current CPython. Other Python implementations (or older or still-under development versions of CPython) may have slightly different performance characteristics. However, it is generally safe to assume that they are not slower by more than a factor of O(log n).

Generally, 'n' is the number of elements currently in the container. 'k' is either the value of a parameter or the number of elements in the parameter.

list

The Average Case assumes parameters generated uniformly at random.

NicolasT

'''
Demonstration of using `splice` with non-blocking IO

Lots of code is similar to 'splice.py', take a look at that module for more
documentation.
'''

import os
import os.path
import errno

jezdez

"""
module mydjangolib.bigint_patch

A fix for the rather well-known ticket #399 in the django project.

Create and link to auto-incrementing primary keys of type bigint without
having to reload the model instance after saving it to get the ID set in
the instance.

Logs:

rgreenjr

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

ionelmc

#!/usr/bin/env python
import os
import tornado.httpserver
import tornado.ioloop
import tornado.web
import subprocess
import shlex
import fcntl
import errno
from cStringIO import StringIO

piscisaureus

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = git@github.com:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

evansd

"""
Utility (Linux only) to ensure subprocesses exit when their parents do by sending
a specified signal when the parent dies.

Usage:

    subprocess.Popen(['some-executable'], preexec_fn=on_parent_exit('SIGHUP'))
"""

import signal

schlamar

import os
import sys
import traceback
from functools import wraps
from multiprocessing import Process, Queue


def processify(func):
    '''Decorator to run a function as a process.
    Be sure that every argument and the return value