abehmiel

"""
Bi-Term Topic Model (BTM) for very short texts.

Literature Reference:
  Xiaohui Yan, Jiafeng Guo, Yanyan Lan, and Xueqi Cheng:
  "A biterm topic model for short texts"
  In Proceedings of WWW '13, Rio de Janeiro, Brazil, pp. 1445-1456.
  ACM, DOI: https://doi.org/10.1145/2488388.2488514

This module requires pre-processing of textual data,

abehmiel

install.packages(
  c(
    "dplyr", # data manipulation
    "tidyr", # data manipulation
    "rmarkdown", # data presentation
    "knitr", # data presentation
    "RODBC", # database tools 
    "RMySQL", # database tools 
    "RPostgreSQL", # database tools 
    "RSQLite", # database tools 

abehmiel

qpdf --password=passwd --decrypt orig.pdf decrypted.pdf

#To input the password
read -s -p "Password: " password && qpdf --password=$password --decrypt orig.pdf decrypted.pdf

abehmiel

RegEx Cheatsheet

Contents:

1. Special characters
2. Quantifiers
3. Special sequences
4. Useful examples

abehmiel

abehmiel

abehmiel

def create_figure(size=3.6,nxticks=6):
    import matplotlib
    from matplotlib.ticker import MaxNLocator
    figure=matplotlib.pyplot.figure(figsize=(size,size)) 
    ax = figure.add_subplot(1, 1, 1, position = [0.2, 0.15, 0.75, 0.75]) 
    ax.xaxis.set_major_locator(MaxNLocator(nxticks)) 
    return ax

def format_axes(ax,xf='%d',yf='%d',nxticks=6,nyticks=6,labelsize=10):
    import pylab

abehmiel

class Graph:
  def __init__(self):
    self.nodes = set()
    self.edges = defaultdict(list)
    self.distances = {}

  def add_node(self, value):
    self.nodes.add(value)

  def add_edge(self, from_node, to_node, distance):

abehmiel

Transforming Code into Beautiful, Idiomatic Python

Notes from Raymond Hettinger's talk at pycon US 2013 video, slides.

The code examples and direct quotes are all from Raymond's talk. I've reproduced them here for my own edification and the hopes that others will find them as handy as I have!

Looping over a range of numbers

for i in [0, 1, 2, 3, 4, 5]:

abehmiel

def memoize(fn):
    cache = {}
    def wrapper(*args):
        try:
            return cache[args]
        except:
            result = fn(*args)
            cache[args] = result
            return result
    return wrapper