类型错误“列表索引必须是整数或切片，而不是元组”（第6行）

Question

i am trying to predict next word in compose mail modal but I am getting above error:

sequences = list ()

for i in range(1, len(encoded)):
    sequence = encoded[i - 1:i + 1]
    sequences.append(sequence)
sequence

X, Y = sequences[:,0], sequences[:,1] # error on this line
X = np.expand_dims(X, 1)
Y = np.expand_dims(Y, 1)

Answer 1

you can do slice like sequences[:,0] , if sequences is ndarray in numpy .

but list is not support that, you can use [seq[0] for seq in sequences] instead.

Answer 2

As you've already figured out, the error is because of this line:

X, Y = sequences[:,0], sequences[:,1]

sequences[:,0] is not valid syntax. Here are a couple of things you might have meant to do:

sequences[:0] will return all elements up to sequences[0] , exclusive. So this would return an empty list in this case.

sequences[0:] will return all elements from sequences[0] to the end of the list, inclusive. In this case it would return [1, 2, 3] .

sequences[0] will of course return the first element of the list.

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This is not causing the error, but be aware that naming variables with capital letters is bad convention. X and Y should be renamed to x and y to keep them consistent with the generally accepted naming conventions for variables and functions.