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

Project description

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

Project details


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