Replace eval functions with helpers to catch exceptions

plexpy/helpers.py

@@ -530,6 +530,20 @@ def cast_to_float(s):
         return 0
 
 
+def helper_divmod(a, b):
+    try:
+        return divmod(a, b)
+    except (ValueError, TypeError):
+        return 0
+
+
+def helper_round(n, ndigits):
+    try:
+        return round(n, ndigits)
+    except (ValueError, TypeError):
+        return 0
+
+
 def convert_xml_to_json(xml):
     o = xmltodict.parse(xml)
     return json.dumps(o)

plexpy/notification_handler.py

@@ -1818,10 +1818,10 @@ def str_eval(field_name, kwargs):
     field_name = field_name.strip('`')
     allowed_names = {
         'bool': bool,
-        'divmod': divmod,
+        'divmod': helpers.helper_divmod,
-        'float': float,
+        'float': helpers.cast_to_float,
-        'int': int,
+        'int': helpers.cast_to_int,
-        'round': round,
+        'round': helpers.helper_round,
         'str': str
     }
     allowed_names.update(kwargs)