Note: This project has gone unmaintained for a while, please use the more up-to-date project at:
This project builds on drs-bloom-filter and bloom_filter_mod.
Credits and links can be found in AUTHORS.md.
pip install bloom_filter
from bloom_filter import BloomFilter
have_met = BloomFilter()
def have_i_met(name):
met = name in have_met
print('Have I met {} before: {}'.format(name, met))
def meet(name):
have_met.add(name)
print('Hello, {}'.format(name))
for name in ['Harry', 'Larry', 'Moe']:
have_i_met(name)
meet(name)
have_i_met(name)
from bloom_filter import BloomFilter
# instantiate BloomFilter with custom settings,
# max_elements is how many elements you expect the filter to hold.
# error_rate defines accuracy; You can use defaults with
# `BloomFilter()` without any arguments. Following example
# is same as defaults:
bloom = BloomFilter(max_elements=10000, error_rate=0.1)
# Test whether the bloom-filter has seen a key:
assert "test-key" in bloom is False
# Mark the key as seen
bloom.add("test-key")
# Now check again
assert "test-key" in bloom is True