Deprecated since version 2.6: The Bastion module has been removed in Python 3.0.
Changed in version 2.3: Disabled module.
The documentation has been left in place to help in reading old code that uses the module.
According to the dictionary, a bastion is “a fortified area or position”, or “something that is considered a stronghold.” It’s a suitable name for this module, which provides a way to forbid access to certain attributes of an object. It must always be used with the rexec module, in order to allow restricted-mode programs access to certain safe attributes of an object, while denying access to other, unsafe attributes.
Protect the object object, returning a bastion for the object. Any attempt to access one of the object’s attributes will have to be approved by the filter function; if the access is denied an AttributeError exception will be raised.
If present, filter must be a function that accepts a string containing an attribute name, and returns true if access to that attribute will be permitted; if filter returns false, the access is denied. The default filter denies access to any function beginning with an underscore ('_'). The bastion’s string representation will be <Bastion for name> if a value for name is provided; otherwise, repr(object) will be used.