remove the 'raise' in construct of Cell

mindspore/nn/cell.py

@@ -315,6 +315,9 @@ class Cell(Cell_):
         return tuple(res)
 
     def __call__(self, *inputs, **kwargs):
+        if self.__class__.construct is Cell.construct:
+            logger.warning(f"The '{self.__class__}' does not override the method 'construct', "
+                           f"will call the super class(Cell) 'construct'.")
         if kwargs:
             bound_args = inspect.signature(self.construct).bind(*inputs, **kwargs)
             inputs = bound_args.args
@@ -681,7 +684,7 @@ class Cell(Cell_):
         Returns:
             Tensor, returns the computed result.
         """
-        raise NotImplementedError
+        return None
 
     def init_parameters_data(self, auto_parallel_mode=False):
         """

tests/ut/python/nn/test_cell.py

@@ -197,8 +197,7 @@ def test_exceptions():
         ModError2(t)
 
     m = nn.Cell()
-    with pytest.raises(NotImplementedError):
-        m.construct()
+    assert m.construct() is None
 
 
 def test_cell_copy():

tests/ut/python/ops/test_ops_check.py

@@ -63,9 +63,7 @@ def test_net_without_construct():
     """ test_net_without_construct """
     net = NetMissConstruct()
     inp = Tensor(np.ones([1, 1, 32, 32]).astype(np.float32))
-    with pytest.raises(RuntimeError) as err:
     _executor.compile(net, inp)
-    assert "Unsupported syntax 'Raise' at " in str(err.value)
 
 
 class NetWithRaise(nn.Cell):

tests/ut/python/pipeline/parse/test_grammar_constraints.py

@@ -196,6 +196,4 @@ def test_missing_construct():
     np_input = np.arange(2 * 3 * 4).reshape((2, 3, 4)).astype(np.bool_)
     tensor = Tensor(np_input)
     net = NetMissConstruct()
-    with pytest.raises(RuntimeError) as er:
-        net(tensor)
-    assert "Unsupported syntax 'Raise' at " in str(er.value)
+    assert net(tensor) is None

tests/ut/python/pipeline/parse/test_super.py

@@ -14,7 +14,6 @@
 # ============================================================================
 """ test super"""
 import numpy as np
-import pytest
 
 import mindspore.nn as nn
 from mindspore import Tensor
@@ -108,9 +107,7 @@ def test_super_cell():
     net = Net(2)
     x = Tensor(np.ones([1, 2, 3], np.int32))
     y = Tensor(np.ones([1, 2, 3], np.int32))
-    with pytest.raises(RuntimeError) as er:
-        net(x, y)
-    assert "Unsupported syntax 'Raise'" in str(er.value)
+    assert net(x, y) is None
 
 
 def test_single_super_in():

tests/ut/python/pynative_mode/nn/test_cell.py

@@ -212,8 +212,7 @@ def test_exceptions():
         ModError2(t)
 
     m = nn.Cell()
-    with pytest.raises(NotImplementedError):
-        m.construct()
+    assert m.construct() is None
 
 
 def test_del():