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#! /usr/local/bin/python
#-*- coding: utf-8 -*-
__author__ = "Cedric Bonhomme"
__version__ = "$Revision: 0.1 $"
__date__ = "$Date: 2010/02/24 $"
__copyright__ = "Copyright (c) 2010 Cedric Bonhomme"
__license__ = "GPLv3"
import re
import pylab
import sqlite3
import hashlib
from datetime import datetime
from string import punctuation
from collections import defaultdict
def remove_html_tags(data):
"""
Remove HTML tags for the search.
"""
p = re.compile(r'<[^<]*?/?>')
return p.sub('', data)
def top_words(dic_articles, n=10):
"""
Return the n most frequent words in a list.
"""
words = {}
articles_content = ""
for rss_feed_id in dic_articles.keys():
for article in dic_articles[rss_feed_id]:
articles_content += remove_html_tags(article[4].encode('utf-8'))
words_gen = (word.strip(punctuation).lower() \
for word in articles_content.split() \
if len(word) >= 5)
words = defaultdict(int)
for word in words_gen:
words[word] += 1
top_words = sorted(words.iteritems(),
key=lambda(word, count): (-count, word))[:n]
return top_words
def create_histogram(words, file_name="./var/histogram.png"):
"""
Create a histogram.
"""
length = 10
ind = pylab.arange(length) # abscissa
width = 0.35 # bars width
w = [elem[0] for elem in words]
count = [int(elem[1]) for elem in words]
max_count = max(count) # maximal weight
p = pylab.bar(ind, count, width, color='r')
pylab.ylabel("Count")
pylab.title("Most frequent words")
pylab.xticks(ind + (width / 2), range(1, len(w)+1))
pylab.xlim(-width, len(ind))
# changing the ordinate scale according to the max.
if max_count <= 100:
pylab.ylim(0, max_count + 5)
pylab.yticks(pylab.arange(0, max_count + 5, 5))
elif max_count <= 200:
pylab.ylim(0, max_count + 10)
pylab.yticks(pylab.arange(0, max_count + 10, 10))
elif max_count <= 600:
pylab.ylim(0, max_count + 25)
pylab.yticks(pylab.arange(0, max_count + 25, 25))
elif max_count <= 800:
pylab.ylim(0, max_count + 50)
pylab.yticks(pylab.arange(0, max_count + 50, 50))
pylab.savefig(file_name, dpi = 80)
pylab.close()
def compare(stringtime1, stringtime2):
"""
Compare two dates in the format 'yyyy-mm-dd hh:mm:ss'.
"""
date1, time1 = stringtime1.split(' ')
date2, time2 = stringtime2.split(' ')
year1, month1, day1 = date1.split('-')
year2, month2, day2 = date2.split('-')
hour1, minute1, second1 = time1.split(':')
hour2, minute2, second2 = time2.split(':')
datetime1 = datetime(year=int(year1), month=int(month1), day=int(day1), \
hour=int(hour1), minute=int(minute1), second=int(second1))
datetime2 = datetime(year=int(year2), month=int(month2), day=int(day2), \
hour=int(hour2), minute=int(minute2), second=int(second2))
if datetime1 < datetime2:
return -1
elif datetime1 > datetime2:
return 1
else:
return 0
def load_feed():
"""
Load feeds in a dictionary.
"""
list_of_feeds = None
list_of_articles = None
try:
conn = sqlite3.connect("./var/feed.db", isolation_level = None)
c = conn.cursor()
list_of_feeds = c.execute("SELECT * FROM feeds").fetchall()
#c.close()
except:
pass
# The key of dic is the id of the feed:
# articles[feed_id] = (article_id, article_date, article_title,
# article_link, article_description, article_readed)
# feeds[feed_id] = (nb_article, nb_article_unreaded, feed_image,
# feed_title, feed_link, feed_site_link)
articles, feeds = {}, {}
if list_of_feeds is not None:
for feed in list_of_feeds:
list_of_articles = c.execute(\
"SELECT * FROM articles WHERE feed_link='" + \
feed[2] + "'").fetchall()
if list_of_articles is not None:
for article in list_of_articles:
sha256_hash = hashlib.sha256()
sha256_hash.update(article[5].encode('utf-8'))
feed_id = sha256_hash.hexdigest()
sha256_hash.update(article[2].encode('utf-8'))
article_id = sha256_hash.hexdigest()
article_list = [article_id, article[0], article[1], \
article[2], article[3], article[4]]
if feed_id not in articles:
articles[feed_id] = [article_list]
else:
articles[feed_id].append(article_list)
# sort articles by date for each feeds
for rss_feed_id in articles.keys():
articles[rss_feed_id].sort(lambda x,y: compare(y[1], x[1]))
feeds[feed_id] = (len(articles[feed_id]), \
len([article for article in articles[feed_id] \
if article[5]=="0"]), \
feed[3], feed[0], feed[2], feed[1] \
)
c.close()
return (articles, feeds)
return (articles, feeds)
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