zlib.crc32(data[, value])
Computes a CRC (Cyclic Redundancy Check) checksum of data. The result is an unsigned 32-bit integer. If value is present, it is used as the starting value of the checksum; otherwise, a default value of 0 is used. Passing in value allows computing a running checksum over the concatenation of several inputs. The algorithm is not cryptographically strong, and should not be used for authentication or digital signatures. Since the algorithm is designed for use as a checksum algorithm, it is not suitable for use as a general hash algorithm.
Changed in version 3.0: Always returns an unsigned value. To generate the same numeric value across all Python versions and platforms, use crc32(data) & 0xffffffff.
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