Python numpy.zeros_like()函数用法

np.zeros_like(a)的目的是构建一个与a同维度的数组，并初始化所有变量为零。

def zeros_like(a, dtype=None, order='K', subok=True, shape=None):
    Return an array of zeros with the same shape and type as a given array.
    Parameters
    ----------
    a : array_like
        The shape and data-type of `a` define these same attributes of
        the returned array.
  out : ndarray
   Array of zeros with the same shape and type as `a`.