numpy.ndarray.tolist method ndarray.tolist() Return the array as an a.ndim-levels deep nested list of Python scalars. nested:嵌套的 Return a copy of the array data as a (nested) Python list. Data items are converted to the nearest
compatible builtin Python type, via the item function.
以(嵌套的)Python列表的形式返回數組數據的副本。通過item函數，將數據項轉換為Python中最接近的兼容內置類型。（有道）
If a.ndim is 0, then since the depth of the nested list is 0, it will not be a list at all, but a simple
Python scalar. Parameters: none Returns: y : object, or list of object, or list of list of object, or … The possibly nested list of array elements. 數組元素的嵌套列表
Notes:
The array may be recreated via a = np.array(a.tolist()), although this may sometimes lose precision.
官網例子截圖：
