BitVector 3.4

A pure-Python memory-efficient packed representation for bit arrays

This class presents a pure-Python memory-efficient packed representation for bit arrays.

Version 3.4 removes a bug and incorporates significant improvements in the documentation.

Version 3.3.2 has a bug fix for the case when you construct a bit vector from a text string that includes character escapes.

The class is provided with the following operators/methods:

• __getitem__

• __setitem__

• __len__

• __iter__

• __contains__

• __getslice__

• __str__

• __int__

• __add__

• __eq__, __ne__, __lt__, __le__, __gt__, __ge__

• __or__

• __and__

• __xor__

• __invert__

• __lshift__

• __rshift__

• __add__

• close_file_object

• count_bits

• count_bits_sparse (faster for sparse bit vectors)

• deep_copy

• divide_into_two

• gcd (for greatest common divisor)

• gen_random_bits

• get_bitvector_in_ascii

• get_bitvector_in_hex

• gf_divide_by_modulus (for modular divisions in GF(2^n))

• gf_MI (for multiplicative inverse in GF(2^n))

• gf_multiply (for multiplications in GF(2))

• gf_multiply_modular (for multiplications in GF(2^n))

• hamming_distance

• int_val (for returning the integer value)

• is_power_of_2

• is_power_of_2_sparse (faster for sparse bit vectors)

• jaccard_distance

• jaccard_similarity

• length

• multiplicative_inverse

• next_set_bit

• pad_from_left

• pad_from_right

• permute

• rank_of_bit_set_at_index

• read_bits_from_file

• reset

• reverse

• runs

• set_value

• shift_left (for non-circular left shift)

• shift_right (for non-circular right shift)

• slice assignment

• test_for_primality

• unpermute

• write_to_file

• write_bits_to_fileobject