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#! /usr/bin/env python
import os
import tempfile
import time
import timeit
import pybloomfilter
tempfiles = []
ERROR_RATE = 0.1
#def get_and_add_words(Creator, wordlist):
def get_and_add_words(Creator, wordlist):
bf = Creator(len(wordlist), ERROR_RATE)
for word in wordlist:
bf.add(word)
return bf
def check_words(bf, wordlist):
for word in wordlist:
word in bf
def test_errors(bf, correct_wordlist, test_wordlist):
errors = [0, 0]
for word in test_wordlist:
if word in bf:
if word not in correct_wordlist:
errors[0] += 1
else:
if word in correct_wordlist:
errors[1] += 1
print '%0.2f%% positive %0.2f%% negative' % (
errors[0] / float(len(correct_wordlist)) * 100,
errors[1] / float(len(correct_wordlist)) * 100)
def create_word_list(filename):
f = open(filename, 'r')
words_set = set()
for line in f:
line = line.strip().lower()
if line:
words_set.add(line)
f.close()
return words_set
def create_cbloomfilter(*args):
args = list(args)
f = tempfile.NamedTemporaryFile()
tempfiles.append(f)
os.unlink(f.name)
args.append(f.name)
return pybloomfilter.BloomFilter(*tuple(args))
creators = [create_cbloomfilter]
try:
import pybloom
except ImportError:
pass
else:
creators.append(pybloom.BloomFilter)
def run_test():
dict_wordlist = create_word_list('words')
test_wordlist = create_word_list('testwords')
NUM = 10
for creator in creators:
start = time.time()
if NUM:
t = timeit.Timer(lambda : get_and_add_words(creator, dict_wordlist))
print "%s took %0.5f s/run" % (
creator,
t.timeit(NUM) / float(NUM))
bf = get_and_add_words(creator, dict_wordlist)
if NUM:
t = timeit.Timer(lambda : check_words(bf, test_wordlist))
print "%s took %0.5f s/run" % (
creator,
t.timeit(NUM) / float(NUM))
raw_input()
test_errors(bf, dict_wordlist, test_wordlist)
if __name__ == "__main__":
run_test()
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