def __sub__(self, other):
        # See explanation in __add__ for the error catched
        # and the return value in that case
        try:
            return theano.tensor.basic.sub(self, other)
        except (__HOLE__, AsTensorError):
            return NotImplemented
dataset/ETHPy150Open rizar/attention-lvcsr/libs/Theano/theano/tensor/var.py/_tensor_py_operators.__sub__