def implementsOnly(*interfaces):
    # This entire approach is invalid under Py3K.  Don't even try to fix
    # the coverage for this block there. :(
    if PYTHON3: #pragma NO COVER
        raise TypeError(_ADVICE_ERROR % 'implementer_only')
    _implements("implementsOnly", interfaces, classImplementsOnly)

##############################################################################
#
# Instance declarations
Computes CRC32C for concat(A, B) given crc(A), crc(B) and len(B).
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/zope/interface/declarations.py/implementsOnly--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/gsutil/gslib/hashing_helper.py/ConcatCrc32c