--- /dev/null
+import unittest
+import tempfile
+import os
+
+import caffe
+
+class SimpleLayer(caffe.Layer):
+ """A layer that just multiplies by ten"""
+
+ def setup(self, bottom, top):
+ pass
+
+ def reshape(self, bottom, top):
+ top[0].reshape(bottom[0].num, bottom[0].channels, bottom[0].height,
+ bottom[0].width)
+
+ def forward(self, bottom, top):
+ top[0].data[...] = 10 * bottom[0].data
+
+ def backward(self, top, propagate_down, bottom):
+ bottom[0].diff[...] = 10 * top[0].diff
+
+def python_net_file():
+ f = tempfile.NamedTemporaryFile(delete=False)
+ f.write("""name: 'pythonnet' force_backward: true
+ input: 'data' input_dim: 10 input_dim: 9 input_dim: 8 input_dim: 7
+ layers { type: PYTHON name: 'one' bottom: 'data' top: 'one'
+ python_param { module: 'test_python_layer' layer: 'SimpleLayer' } }
+ layers { type: PYTHON name: 'two' bottom: 'one' top: 'two'
+ python_param { module: 'test_python_layer' layer: 'SimpleLayer' } }
+ layers { type: PYTHON name: 'three' bottom: 'two' top: 'three'
+ python_param { module: 'test_python_layer' layer: 'SimpleLayer' } }""")
+ f.close()
+ return f.name
+
+class TestPythonLayer(unittest.TestCase):
+ def setUp(self):
+ net_file = python_net_file()
+ self.net = caffe.Net(net_file)
+ os.remove(net_file)
+
+ def test_forward(self):
+ x = 8
+ self.net.blobs['data'].data[...] = x
+ self.net.forward()
+ for y in self.net.blobs['three'].data.flat:
+ self.assertEqual(y, 10**3 * x)
+
+ def test_backward(self):
+ x = 7
+ self.net.blobs['three'].diff[...] = x
+ self.net.backward()
+ for y in self.net.blobs['data'].diff.flat:
+ self.assertEqual(y, 10**3 * x)
+
+ def test_reshape(self):
+ s = 4
+ self.net.blobs['data'].reshape(s, s, s, s)
+ self.net.forward()
+ for blob in self.net.blobs.itervalues():
+ for d in blob.data.shape:
+ self.assertEqual(s, d)