如何使用循環填充Python字典

Question

我想填充此字典，因爲我循環，但是當我打印它檢查時，它似乎只有被添加到字典中的唯一元素是最後一項循環。如何才能做到這一點？

probabilities = {} 
with tf_Session(graph=graph) as sess: 
results = sess.run(output_operation.outputs[0], 
        {input_operation.outputs[0]:t}) 
results = np.squeeze(results) 

top_k = results.argsort()[-5:][::-1] 
labels = load_labels(label_files) 
for j in top_k: 
    print(labels[j], results[j]) 
    probabilities = {labels[j]:results[j]} 

print (probabilities) 

Answer 1

這不是將元素添加到dict的正確語法。您只是每次重置dict。你可能想

probabilities[labels[j]] = results[j] 

，而不是

probabilities = {labels[j]:results[j]} 

Answer 2

您在每次迭代在這裏創建一個新的字典，

probabilities = {labels[j]:results[j]} 

這應該是

probabilities[labels[j]] = results[j] 

Answer 3

這是因爲你在每次迭代中創建一個新的字典你的循環。請嘗試以下操作：

probabilities = {} 
for j in top_k: 
    print(labels[j], results[j]) 
    probabilities[labels[j]] = results[j]