Python get_bf_bit Examples

Example #1

File: rappor_test.py Project: 3652365/rappor

  def testGetBFBit(self):
    cohort = 0
    hash_no = 0
    input_word = "abc"
    ti = self.typical_instance
    # expected_hash = ("\x13O\x0b\xa0\xcc\xc5\x89\x01oI\x85\xc8\xc3P\xfe\xa7 H"
    #                  "\xb0m")
    # Output should be
    # (ord(expected_hash[0]) + ord(expected_hash[1])*256) % 16
    expected_output = 3
    actual = rappor.get_bf_bit(input_word, cohort, hash_no, ti.num_bloombits)
    self.assertEquals(expected_output, actual)

    hash_no = 1
    # expected_hash = ("\xb6\xcc\x7f\xee@\x95\xb0\xdb\xf5\xf1z\xc7\xdaPM"
    #                  "\xd4\xd6u\xed3")
    expected_output = 6
    actual = rappor.get_bf_bit(input_word, cohort, hash_no, ti.num_bloombits)
    self.assertEquals(expected_output, actual)

Example #2

File: rappor_test.py Project: Honin/rappor

    def testGetBFBit(self):
        cohort = 0
        hash_no = 0
        input_word = "abc"
        ti = self.typical_instance
        # expected_hash = ("\x13O\x0b\xa0\xcc\xc5\x89\x01oI\x85\xc8\xc3P\xfe\xa7 H"
        #                  "\xb0m")
        # Output should be
        # (ord(expected_hash[0]) + ord(expected_hash[1])*256) % 16
        expected_output = 3
        actual = rappor.get_bf_bit(input_word, cohort, hash_no,
                                   ti.num_bloombits)
        self.assertEquals(expected_output, actual)

        hash_no = 1
        # expected_hash = ("\xb6\xcc\x7f\xee@\x95\xb0\xdb\xf5\xf1z\xc7\xdaPM"
        #                  "\xd4\xd6u\xed3")
        expected_output = 6
        actual = rappor.get_bf_bit(input_word, cohort, hash_no,
                                   ti.num_bloombits)
        self.assertEquals(expected_output, actual)

Example #3

File: hash_candidates.py Project: 3652365/rappor

def HashCandidates(params, stdin, stdout):
  num_bloombits = params.num_bloombits
  csv_out = csv.writer(stdout)

  for line in stdin:
    word = line.strip()
    row = [word]
    for cohort in xrange(params.num_cohorts):
      for hash_no in xrange(params.num_hashes):
        bf_bit = rappor.get_bf_bit(word, cohort, hash_no, num_bloombits) + 1
        row.append(cohort * num_bloombits + bf_bit)
    csv_out.writerow(row)

Example #4

File: rappor_sim.py Project: cicorias/rappor

def print_map(all_words, params, mapfile):
  """Print Bloom Filter map of values from infile."""
  # Print maps of distributions
  # Required by the R analysis tool
  k = params.num_bloombits
  for word in all_words:
    mapfile.write(word)
    for cohort in xrange(params.num_cohorts):
      for hash_no in xrange(params.num_hashes):
        bf_bit = rappor.get_bf_bit(word, cohort, hash_no, k) + 1
        mapfile.write("," + str(cohort * k + bf_bit))
    mapfile.write("\n")

Example #5

File: hash_candidates.py Project: Honin/rappor

def HashCandidates(params, stdin, stdout):
    num_bloombits = params.num_bloombits
    csv_out = csv.writer(stdout)

    for line in stdin:
        word = line.strip()
        row = [word]
        for cohort in xrange(params.num_cohorts):
            for hash_no in xrange(params.num_hashes):
                bf_bit = rappor.get_bf_bit(word, cohort, hash_no,
                                           num_bloombits) + 1
                row.append(cohort * num_bloombits + bf_bit)
        csv_out.writerow(row)