v3.0.0

Backward incompatible change: dropped the support of Python 2.6.
Fix an BytesIO issues that prevents Python 2.7 from serialising a filter.

v2.3.2

This release allows each filter instance to have the hash function used by the hash maker.

v2.3.1

This release added the union functionality to the scalable Bloom Filter.

v2.2.0

When large integer is passed to the range function, it may cause flow over error. Iterator replaces the range function for Python 2 users.

v2.1.0

The tightening ratio is changed to 0.9, and this ration is consistently used.
Choosing r around 0.8 - 0.9 will result in better average space usage for wide range of growth, therefore the default value of model is set to LARGE_SET_GROWTH.