Append parameter verification for 'attack_config'

mindarmour/diff_privacy/evaluation/membership_inference.py

@@ -124,7 +124,14 @@ class MembershipInference:
             raise TypeError("Type of parameter 'test_train' must be Dataset, "
                             "but got {}".format(type(dataset_train)))
 
+        if not isinstance(attack_config, list):
+            raise TypeError("Type of parameter 'attack_config' must be list, "
+                            "but got {}.".format(type(attack_config)))
+
         for config in attack_config:
+            if not isinstance(config, dict):
+                raise TypeError("Type of each config in 'attack_config' must be dict, "
+                                "but got {}.".format(type(config)))
             if {"params", "method"} != set(config.keys()):
                 raise KeyError("Each config in attack_config must have keys 'method' and 'params', "
                                "but your key value is {}.".format(set(config.keys())))