1.1 --- a/rsvplib.py	Wed Jun 16 01:08:18 2010 +0200
     1.2 +++ b/rsvplib.py	Thu Jun 17 00:35:37 2010 +0200
     1.3 @@ -43,14 +43,17 @@
     1.4          self.int_class = cls.location
     1.5          self.int_instance = cls.instance_template_location
     1.6          cls = self.machine._get_class("__builtins__", "list")
     1.7 -        self.list_class = cls.location
     1.8 -        self.list_instance = cls.instance_template_location
     1.9 +        if cls is not None:
    1.10 +            self.list_class = cls.location
    1.11 +            self.list_instance = cls.instance_template_location
    1.12          cls = self.machine._get_class("__builtins__", "IndexError")
    1.13 -        self.index_error = cls.location
    1.14 -        self.index_error_instance = cls.instance_template_location
    1.15 +        if cls is not None:
    1.16 +            self.index_error = cls.location
    1.17 +            self.index_error_instance = cls.instance_template_location
    1.18          cls = self.machine._get_class("__builtins__", "basestring")
    1.19 -        self.str_class = cls.location
    1.20 -        self.str_instance = cls.instance_template_location
    1.21 +        if cls is not None:
    1.22 +            self.str_class = cls.location
    1.23 +            self.str_instance = cls.instance_template_location
    1.24  
    1.25          self.tuple_class = self.machine.tuple_class
    1.26          self.type_error_instance = self.machine.type_error_instance