Convert tuple to list before concatenation
@@ -200,7 +200,8 @@ class ServiceStats(object):
"reserved name '{}'", format(request_field))
class RequestInfo(object):
- __slots__ = set(request_fields + ServiceStats.RESERVED_REQUEST_FIELDS)
+ __slots__ = set(list(request_fields) +
+ list(ServiceStats.RESERVED_REQUEST_FIELDS))
def __init__(self, **fields_dict):
# Make sure that new object has all request fields
