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Package for calculating checksums using64-bit cyclic redundancy checks (CRC) according to theISO 3309 standard.

Generator polynomial: x⁶⁴ + x⁴ + x³ + x + 1

Reference:W. H. Press, S. A. Teukolsky, W. T. Vetterling, and B. P. Flannery, "Numerical recipes in C", 2nd ed.,Cambridge University Press. Pages 896ff.

• python 3.x

pip install crc64iso

PyPI

• Calculate 64-bit checksum from a string:

from crc64iso.crc64iso import crc64checksum = crc64iso.crc64("ILOVEMATH")

• Calculate 64-bit checksum from incremental (bytes) data:

from crc64iso.crc64iso import crc64_pair, format_crc64_paircrc_pair_1 = crc64_pair("ILOVE".encode())crc_pair_2 = crc64_pair("MATH".encode(), crc_pair_1)checksum = format_crc64_pair(crc_pair_2)