[client] Better management of empty in list

Author: Samuel Hassine

examples/export_intrusion_set_stix2.py

@@ -14,7 +14,7 @@
 intrusion_set = opencti_api_client.intrusion_set.read(filters=[{'key': 'name', 'values': ['APT28']}])
 
 # Create the bundle
-bundle = opencti_api_client.stix2.export_entity('intrusion-set', intrusion_set['id'], 'full')
+bundle = opencti_api_client.stix2.export_entity('campaign', '0d31f298-da86-4330-8c0a-4fcfa44f6ae0', 'full')
 json_bundle = json.dumps(bundle, indent=4)
 
 # Write the bundle

pycti/api/opencti_api_client.py

@@ -199,11 +199,17 @@ def health_check(self):
 
     def not_empty(self, value):
         if value is not None:
-            if isinstance(value, str) or isinstance(value, list):
+            if isinstance(value, str):
                 if len(value) > 0:
                     return True
                 else:
                     return False
+            if isinstance(value, list):
+                is_empty = True
+                for v in value:
+                    if len(v) > 0:
+                        is_empty = False
+                return is_empty
             if isinstance(value, int):
                 return True
             else: