list_test = [0, 10, 0, 0]
arr_test = np.array(list_test)
sum(arr_test * arr_test)
arr_test @ arr_test # 点乘
list_test = [0, 10, 0, 0]
arr_test = np.array(list_test)
sum(arr_test * arr_test)
arr_test @ arr_test # 点乘
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