AttributeError numpy ndarray object has no attribute append

Question

x_train=[]
y_train=[]
for i in range(8,64):
    x_train.append(trs[i-8:i,0])
    y_train.append(trs[i,0])
    x_train,y_train=np.array(x_train),np.array(y_train)
    
    x_train=np.reshape(x_train,(x_train.shape[0],x_train.shape[1],1))

AttributeError                            Traceback (most recent call last)
<ipython-input-24-624f0e25b1ac> in <module>
      2 y_train=[]
      3 for i in range(8,64):
----> 4     x_train.append(trs[i-8:i,0])
      5     y_train.append(trs[i,0])
      6     x_train,y_train=np.array(x_train),np.array(y_train)

AttributeError: 'numpy.ndarray' object has no attribute 'append'

Comments

Hello @Nilesh,

What is trs in your snippet??

Means what is trs[i-8:i,0]?

Answer 1

Hi@Nilesh,

You created two empty lists. And in the for loop, you tried to append values in your list. But in the last part, you tried to convert your list into NumPy array using the same variable name. So I suggest you change your variable name as given below.

x_train=[]
y_train=[]
for i in range(8,64):
    x_train.append(trs[i-8:i,0])
    y_train.append(trs[i,0])
    X_train,Y_train=np.array(x_train),np.array(y_train)

Now try to run your code once, it will work.