if __name__ =='__main__':
y = [0, 2, 1, 2, 0, 1, 0, 0, 2, 1]
result =[]
for i in range(len(y)):
if y[i] == 0:
result.extend([1,0,0])
elif y[i] == 1:
result.extend([0,1,0])
elif y[i] == 2:
result.extend([0,0,1])
else:
result.append(y[i])
print(result)
这里新开了一个result,增加了内存开销
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