1. fix ifftshift(missing negative sign before shifts);

2. add complex data type support for paddle.shape at graph assembly.

python/paddle/fft.py

@@ -1345,7 +1345,7 @@ def ifftshift(x, axes=None, name=None):
         # shift all axes
         rank = len(x.shape)
         axes = list(range(0, rank))
-        shifts = shape // 2
+        shifts = -shape // 2
     elif isinstance(axes, int):
         shifts = -shape[axes] // 2
     else:

python/paddle/fluid/layers/nn.py

@@ -11396,9 +11396,10 @@ def shape(input):
             res = exe.run(fluid.default_main_program(), feed={'x':img}, fetch_list=[output])
             print(res) # [array([  3, 100, 100], dtype=int32)]
     """
-    check_variable_and_dtype(
-        input, 'input',
-        ['bool', 'float16', 'float32', 'float64', 'int32', 'int64'], 'shape')
+    check_variable_and_dtype(input, 'input', [
+        'bool', 'float16', 'float32', 'float64', 'int32', 'int64', 'complex64',
+        'complex128'
+    ], 'shape')
     helper = LayerHelper('shape', **locals())
     out = helper.create_variable_for_type_inference(dtype='int32')
     helper.append_op(

python/paddle/fluid/tests/unittests/fft/test_fft.py

@@ -1009,11 +1009,13 @@ def test_rfftfreq(self):
 
 
 @place(DEVICES)
-@parameterize(
-    (TEST_CASE_NAME, 'x', 'axes', 'dtype'),
-    [('test_1d', np.random.randn(10), (0, ), 'float64'),
-     ('test_2d', np.random.randn(10, 10), (0, 1), 'float64'),
-     ('test_2d_with_all_axes', np.random.randn(10, 10), None, 'float64')])
+@parameterize((TEST_CASE_NAME, 'x', 'axes', 'dtype'), [
+    ('test_1d', np.random.randn(10), (0, ), 'float64'),
+    ('test_2d', np.random.randn(10, 10), (0, 1), 'float64'),
+    ('test_2d_with_all_axes', np.random.randn(10, 10), None, 'float64'),
+    ('test_2d_odd_with_all_axes',
+     np.random.randn(5, 5) + 1j * np.random.randn(5, 5), None, 'complex128'),
+])
 class TestFftShift(unittest.TestCase):
     def test_fftshift(self):
         """Test fftshift with norm condition
@@ -1028,11 +1030,13 @@ def test_fftshift(self):
 
 
 @place(DEVICES)
-@parameterize((TEST_CASE_NAME, 'x', 'axes'), [
-    ('test_1d', np.random.randn(10), (0, ), 'float64'),
-    ('test_2d', np.random.randn(10, 10), (0, 1), 'float64'),
-    ('test_2d_with_all_axes', np.random.randn(10, 10), None, 'float64'),
-])
+@parameterize(
+    (TEST_CASE_NAME, 'x', 'axes'),
+    [('test_1d', np.random.randn(10), (0, ),
+      'float64'), ('test_2d', np.random.randn(10, 10), (0, 1), 'float64'),
+     ('test_2d_with_all_axes', np.random.randn(10, 10), None, 'float64'),
+     ('test_2d_odd_with_all_axes',
+      np.random.randn(5, 5) + 1j * np.random.randn(5, 5), None, 'complex128')])
 class TestIfftShift(unittest.TestCase):
     def test_ifftshift(self):
         """Test ifftshift with norm condition

python/paddle/fluid/tests/unittests/fft/test_fft_with_static_graph.py

@@ -888,6 +888,56 @@ def test_static_ihfftn(self):
                 pass
 
 
+@place(DEVICES)
+@parameterize((TEST_CASE_NAME, 'x', 'axes', 'dtype'), [
+    ('test_1d', np.random.randn(10), (0, ), 'float64'),
+    ('test_2d', np.random.randn(10, 10), (0, 1), 'float64'),
+    ('test_2d_with_all_axes', np.random.randn(10, 10), None, 'float64'),
+    ('test_2d_odd_with_all_axes',
+     np.random.randn(5, 5) + 1j * np.random.randn(5, 5), None, 'complex128'),
+])
+class TestFftShift(unittest.TestCase):
+    def test_fftshift(self):
+        """Test fftshift with norm condition
+        """
+        paddle.enable_static()
+        mp, sp = paddle.static.Program(), paddle.static.Program()
+        with paddle.static.program_guard(mp, sp):
+            input = paddle.static.data('input', x.shape, dtype=x.dtype)
+            output = paddle.fft.fftshift(input, axes)
+
+        exe = paddle.static.Executor(place)
+        exe.run(sp)
+        [output] = exe.run(mp, feed={'input': x}, fetch_list=[output])
+        yield output
+        paddle.disable_static()
+
+
+@place(DEVICES)
+@parameterize(
+    (TEST_CASE_NAME, 'x', 'axes'),
+    [('test_1d', np.random.randn(10), (0, ),
+      'float64'), ('test_2d', np.random.randn(10, 10), (0, 1), 'float64'),
+     ('test_2d_with_all_axes', np.random.randn(10, 10), None, 'float64'),
+     ('test_2d_odd_with_all_axes',
+      np.random.randn(5, 5) + 1j * np.random.randn(5, 5), None, 'complex128')])
+class TestIfftShift(unittest.TestCase):
+    def test_ifftshift(self):
+        """Test ifftshift with norm condition
+        """
+        paddle.enable_static()
+        mp, sp = paddle.static.Program(), paddle.static.Program()
+        with paddle.static.program_guard(mp, sp):
+            input = paddle.static.data('input', x.shape, dtype=x.dtype)
+            output = paddle.fft.ifftshift(input, axes)
+
+        exe = paddle.static.Executor(place)
+        exe.run(sp)
+        [output] = exe.run(mp, feed={'input': x}, fetch_list=[output])
+        yield output
+        paddle.disable_static()
+
+
 if __name__ == '__main__':
     unittest.main()