disable callbacks.setter, make it a property

examples/GAN/DCGAN.py

@@ -124,7 +124,7 @@ def get_config():
         dataflow=get_data(opt.data),
         callbacks=[ModelSaver()],
         steps_per_epoch=300,
-        max_epoch=100,
+        max_epoch=200,
     )
 
 

tensorpack/train/config.py

@@ -94,8 +94,8 @@ class TrainConfig(object):
                 MovingAverageSummary(),
                 ProgressBar(),
                 MergeAllSummaries()]
-        self.callbacks = callbacks + extra_callbacks
-        assert_type(self.callbacks, list)
+        self._callbacks = callbacks + extra_callbacks
+        assert_type(self._callbacks, list)
 
         if monitors is None:
             monitors = [TFSummaryWriter(), JSONWriter(), ScalarPrinter()]
@@ -170,6 +170,10 @@ class TrainConfig(object):
     def nr_tower(self, value):
         self.tower = list(range(value))
 
+    @property
+    def callbacks(self):        # disable setter
+        return self._callbacks
+
     @property
     def optimizer(self):
         """ for back-compatibilty only. will remove in the future"""