Python tf.sparse.mask用法及代码示例

屏蔽 IndexedSlices 的元素。

用法

tf.sparse.mask(
    a, mask_indices, name=None
)

给定一个 IndexedSlices 实例 a ，返回另一个包含 a 切片子集的 IndexedSlices 。仅返回未在 mask_indices 中指定的索引处的切片。

当您需要提取 IndexedSlices 对象中的切片子集时，这很有用。

例如：

# `a` contains slices at indices [12, 26, 37, 45] from a large tensor
# with shape [1000, 10]
a.indices  # [12, 26, 37, 45]
tf.shape(a.values)  # [4, 10]

# `b` will be the subset of `a` slices at its second and third indices, so
# we want to mask its first and last indices (which are at absolute
# indices 12, 45)
b = tf.sparse.mask(a, [12, 45])

b.indices  # [26, 37]
tf.shape(b.values)  # [2, 10]