From b4c1d17580777fcc5118efa26b230432c0221b6a Mon Sep 17 00:00:00 2001
From: Haonan <haonanyu@baidu.com>
Date: Thu, 26 Jan 2017 17:52:47 -0800
Subject: [PATCH] remove flip_layer

---
 .../paddle/trainer_config_helpers/layers.py   | 41 -------------------
 .../tests/layers_test_config.py               |  3 +-
 2 files changed, 1 insertion(+), 43 deletions(-)

diff --git a/python/paddle/trainer_config_helpers/layers.py b/python/paddle/trainer_config_helpers/layers.py
index c506977ca4e..19f7ec31865 100755
--- a/python/paddle/trainer_config_helpers/layers.py
+++ b/python/paddle/trainer_config_helpers/layers.py
@@ -71,7 +71,6 @@ __all__ = [
     'bilinear_interp_layer',
     'trans_layer',
     'rotate_layer',
-    'flip_layer',
     'sum_to_one_norm_layer',
     'get_output_layer',
     'LayerType',
@@ -1720,46 +1719,6 @@ def rotate_layer(input, height, name=None, layer_attr=None):
         size=l.config.size)
 
 
-@wrap_name_default()
-@layer_support()
-def flip_layer(input, height, name=None, layer_attr=None):
-    """
-    A layer for flipping the matrix w.r.t the matrix center.
-    It's essentially rotating the matrix twice.
-    Used for input as image or map.
-
-    .. math::
-       y(i,j) = x(M-i-1, N-j-1)
-
-    where :math:`x` is (M x N) input, and :math:`y` is (M x N) output.
-
-    The example usage is:
-
-    .. code-block:: python
-
-       flip = flip_layer(input=layer,
-                         height=100)
-
-    :param input: Input layer.
-    :type input: LayerOutput
-    :param height: The height of the sample matrix
-    :type height: int
-    :param name: Layer name.
-    :type name: basestring
-    :param layer_attr: extra layer attributes.
-    :type layer_attr: ExtraLayerAttribute.
-    :return: LayerOutput object.
-    :rtype: LayerOutput
-    """
-    assert isinstance(input, LayerOutput)
-    return rotate_layer(
-        input=rotate_layer(
-            input=input, height=height),
-        height=height,
-        name=name,
-        layer_attr=layer_attr)
-
-
 @wrap_name_default()
 @layer_support()
 def cos_sim(a, b, scale=1, size=1, name=None, layer_attr=None):
diff --git a/python/paddle/trainer_config_helpers/tests/layers_test_config.py b/python/paddle/trainer_config_helpers/tests/layers_test_config.py
index 3d417a00601..1964e6f113e 100644
--- a/python/paddle/trainer_config_helpers/tests/layers_test_config.py
+++ b/python/paddle/trainer_config_helpers/tests/layers_test_config.py
@@ -40,7 +40,6 @@ assert z1.size > 0
 
 y2 = fc_layer(input=y, size=15)
 z2 = rotate_layer(input=y2, height=5)
-z3 = flip_layer(input=y2, height=3)
 
 cos1 = cos_sim(a=x1, b=y1)
 cos3 = cos_sim(a=x1, b=y2, size=3)
@@ -48,7 +47,7 @@ cos3 = cos_sim(a=x1, b=y2, size=3)
 linear_comb = linear_comb_layer(weights=x1, vectors=y2, size=3)
 
 out = fc_layer(
-    input=[cos1, cos3, linear_comb, z, z1, z2, z3],
+    input=[cos1, cos3, linear_comb, z, z1, z2],
     size=num_classes,
     act=SoftmaxActivation())
 
-- 
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