Fixed TF graph variables deprecation

baselines/common/tf_util.py

@@ -526,7 +526,7 @@ class Module(object):
     @property
     def variables(self):
         assert self.scope is not None, "need to call module once before getting variables"
-        return tf.get_collection(tf.GraphKeys.VARIABLES, self.scope)
+        return tf.get_collection(tf.GraphKeys.GLOBAL_VARIABLES, self.scope)
 
 
 def module(name):
@@ -681,7 +681,7 @@ def scope_vars(scope, trainable_only=False):
         list of variables in `scope`.
     """
     return tf.get_collection(
-        tf.GraphKeys.TRAINABLE_VARIABLES if trainable_only else tf.GraphKeys.VARIABLES,
+        tf.GraphKeys.TRAINABLE_VARIABLES if trainable_only else tf.GraphKeys.GLOBAL_VARIABLES,
         scope=scope if isinstance(scope, str) else scope.name
     )