fix save error

ppgan/models/base_model.py

@@ -93,7 +93,7 @@ class BaseModel(ABC):
         This function wraps <forward> function in no_grad() so we don't save intermediate steps for backprop
         It also calls <compute_visuals> to produce additional visualization results
         """
-        with paddle.imperative.no_grad():
+        with paddle.no_grad():
             self.forward()
             self.compute_visuals()
 

ppgan/models/pix2pix_model.py

@@ -86,7 +86,7 @@ class Pix2PixModel(BaseModel):
         self.fake_B = self.netG(self.real_A)  # G(A)
 
     def forward_test(self, input):
-        input = paddle.imperative.to_variable(input)
+        input = paddle.to_tensor(input)
         return self.netG(input)
 
     def backward_D(self):

ppgan/utils/filesystem.py

@@ -3,17 +3,19 @@ import six
 import pickle
 import paddle
 
+
 def makedirs(dir):
     if not os.path.exists(dir):
         os.makedirs(dir)
 
-def save(state_dicts, file_name):
 
+def save(state_dicts, file_name):
     def convert(state_dict):
         model_dict = {}
-        
+
         for k, v in state_dict.items():
-            if isinstance(v, (paddle.framework.Variable, paddle.imperative.core.VarBase)):
+            if isinstance(
+                    v, (paddle.framework.Variable, paddle.fluid.core.VarBase)):
                 model_dict[k] = v.numpy()
             else:
                 model_dict[k] = v
@@ -22,14 +24,15 @@ def save(state_dicts, file_name):
 
     final_dict = {}
     for k, v in state_dicts.items():
-        if isinstance(v, (paddle.framework.Variable, paddle.imperative.core.VarBase)):
+        if isinstance(v,
+                      (paddle.framework.Variable, paddle.fluid.core.VarBase)):
             final_dict = convert(state_dicts)
             break
         elif isinstance(v, dict):
             final_dict[k] = convert(v)
         else:
             final_dict[k] = v
-    
+
     with open(file_name, 'wb') as f:
         pickle.dump(final_dict, f, protocol=2)
 
@@ -39,7 +42,3 @@ def load(file_name):
         state_dicts = pickle.load(f) if six.PY2 else pickle.load(
             f, encoding='latin1')
     return state_dicts
-
-    
-
-    
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