import numpy as np class Test(np.nditer): ... # E: Cannot inherit from final class np.nditer([0, 1], flags=["test"]) # E: incompatible type np.nditer([0, 1], op_flags=[["test"]]) # E: incompatible type np.nditer([0, 1], itershape=(1.0,)) # E: incompatible type np.nditer([0, 1], buffersize=1.0) # E: incompatible type