def test_bf_add(self):
""" test estimate elements is correct """
blm = BloomFilter(est_elements=10, false_positive_rate=0.05)
res1 = blm.estimate_elements()
blm.add("this is a test")
res2 = blm.estimate_elements()
self.assertNotEqual(res1, res2)
self.assertEqual(res1, 0)
self.assertEqual(res2, 1)
self.assertEqual(blm.elements_added, 1)
def test_bf_add(self):
''' test estimate elements is correct '''
blm = BloomFilter(est_elements=10, false_positive_rate=0.05)
res1 = blm.estimate_elements()
blm.add('this is a test')
res2 = blm.estimate_elements()
self.assertNotEqual(res1, res2)
self.assertEqual(res1, 0)
self.assertEqual(res2, 1)
self.assertEqual(blm.elements_added, 1)
def test_bf_all_bits_set(self):
"""test inserting too many elements so that the all bits are set"""
blm = BloomFilter(est_elements=10, false_positive_rate=0.05)
for i in range(100):
blm.add(str(i))
# NOTE: this causes an exception when all bits are set
self.assertEqual(-1, blm.estimate_elements())
stock_symbol_file.write(check_stock_symbol + "," + ' Defenitely Not Traded\n')
stock_symbol_file.write('Probably Traded Count,' + str(prob_present_count) + "\n")
stock_symbol_file.write('Traded Count,' + str(present_count) + "\n")
stock_symbol_file.write('False +ve Traded Count,' + str(false_postive_count) + "\n")
stock_symbol_file.write('Definitely Not Traded Count,' + str(not_present_count) + "\n")
stock_trade_file.close()
stock_exists_bf.export(stock_exists_bf_filename)
timenow = datetime.datetime.now()
bf_endtime = str(timenow.strftime("%x")) + ' ' + str((timenow.strftime("%X")))
est_elemnts_added_bf = stock_exists_bf.elements_added
est_elements_planned = stock_exists_bf.estimated_elements
stocks_added = len(stock_symbol_dist)
est_unique_elements = stock_exists_bf.estimate_elements()
process_file.write(str(est_elemnts_added_bf))
process_file.write("," + str(est_elements_planned))
process_file.write("," + str(stocks_added))
process_file.write("," + str(est_unique_elements))
process_file.write("," + str(false_postive_count))
process_file.write("," + str(false_postive_count/est_unique_elements))
process_file.write("," + str(stock_exists_bf.bloom_length))
process_file.write("," + str(stock_exists_bf.number_hashes))
process_file.write("," + str(no_of_record))
process_file.write("," + str(stock_exists_bf.false_positive_rate))
process_file.write("," + str(stock_exists_bf.current_false_positive_rate()))
process_file.write("," + str(stock_exists_bf.number_bits))