1. 官文链接：[https://numpy.org/doc/1.20/reference/arrays.ndarray.html](https://numpy.org/doc/1.20/reference/arrays.ndarray.html)

    这里的内容属于常规ndarray构造数组的内容，ndarray属于比较低级的数组构造方法，但其中的附带属性，方法基本能够满足使用，可以考虑掌握。

    The number of dimensions and items in an array is definde by its shape( what is shape? ),which is a tuple of N non-negative integers that specify the sizes of each dimension.
    New arrays can be constructed using the routines detailed in Array creation routines, and also by using the low-levelndarrayconstructor。