TypeError：无法将类型TensorType（float64，向量）转换为类型TensorType（float64，矩阵）

Question

编译我的脚本会出现此错误：

TypeError: Cannot convert Type TensorType(float64, vector) (of Variable Subtensor{int64:int64:}.0) into Type TensorType(float64, matrix). You can try to manually convert Subtensor{int64:int64:}.0 into a TensorType(float64, matrix).

这是编译器给出错误的代码段：

  train = theano.function(
              inputs = [index], outputs = cost,                
              updates = Optimizers_update(cost, Params, self.learning_rate, self.optimizer).run_optimizer(),
              givens = { X: train_X[0:index], Y: train_y[0:index] },
              allow_input_downcast = True,
              mode='DebugMode') # Compile [ call external class Optimizers_update ]

  predict_valid = theano.function(inputs = [index], outputs = py_x, givens = { X: test_X[0:index],}, allow_input_downcast = True)

有人有解决方案或建议吗？