follow stab21, 1. referring to PyQCU/pyqcu/smear/_stout.py, the multi-threaded version of stout-smear done and pass the test; 2. NEVER NEVER USE THE SHIT LIKE THAT "[[torch.zeros([]), torch.zeros([]), torch.zeros([]), torch.zeros([])]]*4"; 3. NEVER NEVER USE THE SHIT LIKE THAT "[[torch.zeros([]), torch.zeros([]), torch.zeros([]), torch.zeros([])]]*4"; 4. NEVER NEVER USE THE SHIT LIKE THAT "[[torch.zeros([]), torch.zeros([]), torch.zeros([]), torch.zeros([])]]*4". ^_^