From the announcement of the open source reddit:
There are only five of us who work on reddit; we couldn’t have made this site if it weren’t for a great community of developers. In no particular order, here’s a quick list of the open source products that reddit is built and runs upon: Debian, lighttpd, HAProxy, [...]
Step 1: PostgreSQL (8.2)
Installing postgresql (8.2)
sudo apt-get install postgresql-8.2
Setting up the password for postgres’ postgres user
sudo -u postgres psql template1
ALTER USER postgres WITH PASSWORD ‘your-password’;
\q
Configure postgres’ authentication method :
sudo cp /etc/postgresql/8.2/main/pg_hba.conf /etc/postgresql/8.2/main/pg_hba.conf_bak
sudo nano /etc/postgresql/8.2/main/pg_hba.conf
Add the following at the bottom of the file
# TYPE DATABASE USER [...]
from: Python Is Not Java (dirtSimple)
So, if you don’t feel like you’re at least ten times more productive with Python than Java, chances are good that you’ve been forgetting to use the time machine! (And if you miss your Java IDE, consider the possibility that it’s because your Python program is much more complex than [...]
Web-Safe Arithmetic Expressions Evaluator
import math
import re
whitelist = ‘|’.join(
# oprators, digits
['-', '\+', '/', '\\', '\*', '\^', '\*\*', '\(', '\)', '\d+']
# functions of math module (ex. __xxx__)
+ [f for f in dir(math) if f[:2] != ‘__’])
valid = lambda exp: re.match(whitelist, exp)
>>> [...]
Python is so beautiful and elegant
See this:
def fib():
a, b = 0, 1
while 1:
yield b
a, b = b, a+b
if __name__ == ‘__main__’:
f = fib()
for [...]
Revenge of the Nerds yielded a collection of canonical solutions to the same problem in a number of languages.
The problem: Write a function foo that takes a number n and returns a function that takes a number i, and returns n incremented by i.
Note: (a) that’s number, not integer, (b) that’s incremented by, not plus.
# a simple tcp server
import SocketServer
class EchoRequestHandler(SocketServer.BaseRequestHandler ):
def setup(self):
print self.client_address, ‘connected!’
self.request.send(’hi ‘ + str(self.client_address) + ‘\n’)
def handle(self):
data = ‘dummy’
[...]
Using Python is like eating delicate gourmet foods. You know, great and innovative ideas, small portions, cheering up your mind, and tasting of the “Good Life”. Whereas using Lisp is like cooking that food.
from datetime import date, timedelta
def calc(year, week):
d = date(year,1,1)
d = d - timedelta(d.weekday())
dlt = timedelta(days = (week-1)*7)
return d + dlt, d + dlt + timedelta(days=6)
The following 4 lines says it all:
x = 2
for y in range(2,24):
… x= x*x*y
… print x, ‘\n’
Watching the generated numbers running on the screen get me so high that I feel I can start writing poetry.
Try it for yourself
import os, re, sys
from os.path import join
rootdir = ‘/’
filter = ‘.*\.js$|.*\.py$|.*\.html$|.*\.css$|.*\.sql$|.*\.cs$|.*\.cpp$|.*\.c$|.*\.h|.*\.java$’
def usage():
print ‘USAGE: python loc.py /<rootdir>’
def loc(fname):
try:
f = open(fname)
return len(f.readlines())
except:
[...]
I am trying to find my way in the open-source world. So far, for almost a decade, I did all kind of projects mostly database-driven applications, all using Microsoft tools running on Microsoft servers and desktops.
Even though I was generally satisfied with my achievements, I coudn’t ignore this growing community of smart people who twist [...]
