fix bug in function `is_to_variable`. test=develop (#23147)

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

@@ -45,8 +45,15 @@ def is_api_in_module(node, module_prefix):
     assert isinstance(node, gast.Call), "Input non-Call node for is_dygraph_api"
     func_str = astor.to_source(gast.gast_to_ast(node.func))
     try:
+        # TODO(liym27):
+        #  Consider a better to import modules like:
+        #  source_file = inspect.getfile(dyfunc)
+        #  import_statements = ImportVisitor(source_file).transform()
+        #  import_str = "".join(import_statements)
         import paddle.fluid as fluid
         import paddle
+        from paddle.fluid.dygraph import to_variable
+        import paddle.fluid.dygraph as dygraph
         return eval("_is_api_in_module_helper({}, '{}')".format(func_str,
                                                                 module_prefix))
     except NameError:
@@ -148,8 +155,8 @@ def _add_keywords_to(node, dygraph_api_name):
 def is_to_variable(node):
     assert isinstance(node, gast.Call)
     if is_dygraph_api(node):
-        api_name = node.func.attr
-        return api_name == "to_variable"
+        api_name = ast_to_source_code(node.func).strip()
+        return api_name.endswith("to_variable")
     return False
 
 

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

@@ -15,11 +15,13 @@
 from __future__ import print_function
 
 import numpy as np
-import paddle.fluid as fluid
 import unittest
 import inspect
 import gast
 
+import paddle.fluid as fluid
+import paddle.fluid.dygraph as dygraph
+from paddle.fluid.dygraph import to_variable
 from paddle.fluid.dygraph.jit import dygraph_to_static_graph
 from paddle.fluid.dygraph.dygraph_to_static.utils import is_dygraph_api
 
@@ -33,14 +35,21 @@ def dyfunc_to_variable(x):
 
 
 def dyfunc_to_variable_2(x):
-    res = fluid.dygraph.to_variable(value=np.zeros(shape=(1), dtype=np.int32))
+    res = dygraph.to_variable(value=np.zeros(shape=(1), dtype=np.int32))
+    return res
+
+
+def dyfunc_to_variable_3(x):
+    res = to_variable(x, name=None, zero_copy=None)
     return res
 
 
 class TestDygraphBasicApi_ToVariable(unittest.TestCase):
     def setUp(self):
         self.input = np.ones(5).astype("int32")
-        self.test_funcs = [dyfunc_to_variable, dyfunc_to_variable_2]
+        self.test_funcs = [
+            dyfunc_to_variable, dyfunc_to_variable_2, dyfunc_to_variable_3
+        ]
         self.place = fluid.CUDAPlace(0) if fluid.is_compiled_with_cuda(
         ) else fluid.CPUPlace()
 
@@ -72,8 +81,6 @@ class TestDygraphBasicApi_ToVariable(unittest.TestCase):
 
 
 # 1. test Apis that inherit from layers.Layer
-
-
 def dyfunc_BilinearTensorProduct(layer1, layer2):
     bilinearTensorProduct = fluid.dygraph.nn.BilinearTensorProduct(
         input1_dim=5,