SHA3-256 belongs to the SHA-3 family of cryptographic hashes, as specified in FIPS 202.
The hash function produces the 256 bit digest of a message:
>>> from Crypto.Hash import SHA3_256
>>>
>>> h_obj = SHA3_256.new()
>>> h_obj.update(b'Some data')
>>> print h_obj.hexdigest()
SHA stands for Secure Hash Algorithm.
Crypto.Hash.SHA3_256