sklearn.utils.murmurhash3_32

sklearn.utils.murmurhash3_32()

Compute the 32bit murmurhash3 of key at seed.

The underlying implementation is MurmurHash3_x86_32 generating low latency 32bits hash suitable for implementing lookup tables, Bloom filters, count min sketch or feature hashing.

Parameters:

key : int32, bytes, unicode or ndarray with dtype int32

the physical object to hash

seed : int, optional default is 0

integer seed for the hashing algorithm.

positive : boolean, optional default is False

True: the results is casted to an unsigned int

from 0 to 2 ** 32 - 1

False: the results is casted to a signed int

from -(2 ** 31) to 2 ** 31 - 1