rduplain

Goal: Connect to MSSQL using FreeTDS / ODBC in Python.

Host: Ubuntu 11.10 x86_64

Install:

sudo apt-get install freetds-dev freetds-bin unixodbc-dev tdsodbc
pip install pyodbc sqlalchemy

In /etc/odbcinst.ini:

hileon

Sublime Text 2 – Useful Shortcuts (Windows)

General

Ctrl+KB	toggle side bar
Ctrl+Shift+P	command prompt
Ctrl+`	python console
Ctrl+N	new file

Editing

hrldcpr

One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:

def tree(): return defaultdict(tree)

That's it!

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

emctoo

;
(define (atom? x)
  (and (not (pair? x)) (not (null? x))))

; consist of atoms
(define (lat? l)
  (cond
    ((null? l) #f)
    ((atom? (car l)) (lat? (cdr l)))
    (else #f)))

hryk

from distutils.core import setup
from distutils.extension import Extension
from Cython.Distutils import build_ext

ext_modules = [
        Extension("test_um",
            ["test_um.pyx"],
            include_dirs=["/usr/local/include/boost"],
            library_dirs=["/usr/local/lib"],
            language="c++")

SzymonPobiega

If you have two days to learn the very basics of modelling, Domain-Driven Design, CQRS and Event Sourcing, here's what you should do:

In the evenings read the [Domain-Driven Design Quickly Minibook]{http://www.infoq.com/minibooks/domain-driven-design-quickly}. During the day watch following great videos (in this order):

1. Eric Evans' [What I've learned about DDD since the book]{http://www.infoq.com/presentations/ddd-eric-evans}
2. Eric Evans' [Strategic Design - Responsibility Traps]{http://www.infoq.com/presentations/design-strategic-eric-evans}
3. Udi Dahan's [Avoid a Failed SOA: Business & Autonomous Components to the Rescue]{http://www.infoq.com/presentations/SOA-Business-Autonomous-Components}
4. Udi Dahan's [Command-Query Responsibility Segregation]{http://www.infoq.com/presentations/Command-Query-Responsibility-Segregation}
5. Greg Young's [Unshackle Your Domain]{http://www.infoq.com/presentations/greg-young-unshackle-qcon08}
6. Eric Evans' [Acknowledging CAP at the Root -- in the Domain Model]{ht

brentp

from sklearn import linear_model
from scipy import stats
import numpy as np


class LinearRegression(linear_model.LinearRegression):
    """
    LinearRegression class after sklearn's, but calculate t-statistics
    and p-values for model coefficients (betas).
    Additional attributes available after .fit()

perrygeo

apt-get install python-pygraphviz
pip install django-extensions
# add 'django_extensions' to INSTALLED_APPS in settings.py
python manage.py graph_models trees -o test.png

abinoda

Recursion

What is recursion?

A recursive function is a function that makes a call to itself.

To prevent infinite recursion, you need at least one branch (i.e. of an if/else statement) that does not make a recursive call. Branches without recursive calls are called base cases; branches with recursive calls are called recursive cases.

def factorial_recursive(n)
 if n == 0