add return_numpy back (#10892)

python/paddle/fluid/inferencer.py

@@ -56,7 +56,7 @@ class Inferencer(object):
         else:
             self.exe = executor.Executor(self.place)
 
-    def infer(self, inputs):
+    def infer(self, inputs, return_numpy=True):
         """
         :param inputs: a map of {"input_name": input_var} that will be feed into the inference program
         to get the predict value
@@ -66,9 +66,11 @@ class Inferencer(object):
             raise ValueError(
                 "inputs should be a map of {'input_name': input_var}")
 
-        with self._prog_and_scope_guard():
-            results = self.exe.run(feed=inputs,
-                                   fetch_list=[self.predict_var.name])
+        with executor.scope_guard(self.scope):
+            results = self.exe.run(self.inference_program,
+                                   feed=inputs,
+                                   fetch_list=[self.predict_var],
+                                   return_numpy=return_numpy)
 
         return results
 

python/paddle/fluid/tests/book/high-level-api/fit_a_line/test_fit_a_line.py

@@ -92,7 +92,7 @@ def infer(use_cuda, inference_program, save_dirname=None):
     tensor_x = numpy.random.uniform(0, 10, [batch_size, 13]).astype("float32")
 
     results = inferencer.infer({'x': tensor_x})
-    print("infer results: ", numpy.array(results[0]))
+    print("infer results: ", results[0])
 
 
 def main(use_cuda):

python/paddle/fluid/tests/book/high-level-api/recognize_digits/test_recognize_digits_conv.py

@@ -112,7 +112,7 @@ def infer(use_cuda, inference_program, save_dirname=None):
 
     results = inferencer.infer({'img': tensor_img})
 
-    print("infer results: ", numpy.array(results[0]))
+    print("infer results: ", results[0])
 
 
 def main(use_cuda):

python/paddle/fluid/tests/book/high-level-api/recognize_digits/test_recognize_digits_mlp.py

@@ -93,7 +93,7 @@ def infer(use_cuda, inference_program, save_dirname=None):
 
     results = inferencer.infer({'img': tensor_img})
 
-    print("infer results: ", numpy.array(results[0]))
+    print("infer results: ", results[0])
 
 
 def main(use_cuda):