TypeError：不可散列的类型：Python 程序中的“numpy.ndarray”

Question

Here is my code:

dic = test_dataset.class_indices
idc = {k:v for v, k in dic.items()}

img = load_img( r'C:\Users\sreep\Downloads\Alzheimer_s Dataset\test\NonDemented\26 (62).jpg', target_size = (224,224,3))
img = img_to_array(img)
img = img/255
imshow(img)
plt.axis('off')
img = np.expand_dims(img,axis=0)
answer = model.predict(img)
probability = round(np.max(model.predict(img)*100),2)

print(probability, '% chances are there that the image is',idc[answer[0]])

Error:

TypeError                                 Traceback (most recent call last)
~\AppData\Local\Temp/ipykernel_17688/2364562646.py in <module>
     13 probability = round(np.max(model.predict(img)*100),2)
     14 
---> 15 print(probability, '% chances are there that the image is',idc[answer[0]])

TypeError: unhashable type: 'numpy.ndarray'

Answer 1

answer[0] is a numpy array and you are trying to use it as a key to the dictionary idc . Dictionary keys should be hashable, hence the error. Also please provide an example next time so other people can replicate your problem.

Answer 2

Use this:

 idc[np.argmax(answer[0])]