re sub with r'\1' as dict value for replacement

Question

I have a dictionnary such as:

OBJECT = {
r\'\\b(.+)(NA[Cc].+)\\b\':\'__@_OBJECT_@_\'+r\'\\1\'+r\'\\2\'+\'_@@__\',
r\'\\b([O]linked.+)\\b\':\'__@_OBJECT_@_\'+r