[Dy2stat] Reduce Exception Type for Better Error Message (#29268)

Reduce exception type so that if covert_to_static failed, it reports right error message.

python/paddle/fluid/dygraph/dygraph_to_static/convert_call_func.py

@@ -226,7 +226,7 @@ def convert_call(func):
                 # So descriptor mechanism is used to bound `self` instance on function to
                 # keep it as bound method.
                 setattr(func, 'forward', forward_func.__get__(func))
-            except Exception:
+            except (IOError, OSError, TypeError):
                 # NOTE: func.forward may have been decorated.
                 func_self = None if func_self else func_self
             converted_call = func
@@ -235,7 +235,7 @@ def convert_call(func):
                 call_func = func.__class__.__call__
                 converted_call = convert_to_static(call_func)
                 func_self = func
-            except Exception:
+            except (IOError, OSError, TypeError):
                 # NOTE:
                 # If `func` is a class which is being initialized, for example `convert_call(Foo)()`,
                 # it doesn't need to be transformed

python/paddle/fluid/tests/unittests/dygraph_to_static/test_convert_operators.py

@@ -17,6 +17,39 @@ import paddle
 import unittest
 
 
+class CallNotExist(paddle.nn.Layer):
+    def __call__(self):
+        # call a non-exist API to trigger exception
+        return paddle.nn.not_exist_api
+
+
+class ForwardNotExist(paddle.nn.Layer):
+    def forward(self):
+        return 0
+
+
+net = ForwardNotExist()
+setattr(net, "forward", "A string so that convert forward will fail")
+
+
+class TestConvertCall(unittest.TestCase):
+    def test_class_exception(self):
+        @paddle.jit.to_static
+        def call_not_exist():
+            net = CallNotExist()
+            return net()
+
+        with self.assertRaises(AttributeError):
+            call_not_exist()
+
+        @paddle.jit.to_static
+        def forward_not_exist():
+            return net()
+
+        with self.assertRaises(TypeError):
+            forward_not_exist()
+
+
 class TestConvertShapeCompare(unittest.TestCase):
     def test_non_variable(self):
         self.assertEqual(