def set_biases(self, biases, recenter=False):
        self.b.set_value(biases)
        if recenter:
            assert self.center
            if self.pool_size != 1:
                raise NotImplementedError()
            self.offset.set_value(sigmoid_numpy(self.b.get_value()))
L{writeTraceback} writes to the default log, if none is
dataset/ETHPy150Open lisa-lab/pylearn2/pylearn2/models/dbm/ising.py/IsingHidden.set_biases--crossover with--dataset/ETHPy150Open ClusterHQ/eliot/eliot/tests/test_traceback.py/TracebackLoggingTests.test_writeTracebackDefaultLogger