提交 10cd6eb6 编写于 作者: Y yangyaming

Add doc for lod_rank_table.

上级 8b91174c
...@@ -397,9 +397,40 @@ class While(object): ...@@ -397,9 +397,40 @@ class While(object):
def lod_rank_table(x, level=0): def lod_rank_table(x, level=0):
""" """LoD Rank Table Operator. Given an input variable `x` and a LoD level,
This function creates an operator for creating a LOD_RANK_TABLE this layer creates a LodRankTable object. A LoDRankTable object contains a
using the input x. list of bi-element tuples and each tuple consists of an index and a length.
For given level's LoD information, the index is the sequence position and
the length representes the sequence length. Please note that the list is
ranked in descending order by the length. The following is an example:
.. code-block:: text
x is a LoDTensor:
x.lod = [[0, 1, 2, 3],
[0, 5, 6, 7]]
x.data = [a, b, c, d, e, f, g]
Create lod rank table:
lod_rank_table_obj = lod_rank_table(x, level=1)
Get:
lod_rank_table_obj.items() = [(0, 5), (1, 1), (2, 1)]
Args:
x (Variable): Input variable, a LoDTensor based which to create the lod
rank table.
level (int): Specify the LoD level.
Returns:
Variable: The created LoDRankTable object.
Examples:
.. code-block:: python
x = fluid.layers.data(name='x', shape=[10],
dtype='float32', lod_level=1)
out = layers.lod_rank_table(x=x, level=0)
""" """
helper = LayerHelper("lod_rank_table", **locals()) helper = LayerHelper("lod_rank_table", **locals())
table = helper.create_variable( table = helper.create_variable(
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册