python3-zope.proxy 4.2.0-1build2 (armhf binary) in ubuntu bionic

 Proxies are special objects which serve as mostly-transparent wrappers around
 another object, intervening in the apparent behavior of the wrapped object
 only when necessary to apply the policy (e.g., access checking, location
 brokering, etc.) for which the proxy is responsible.
 .
 This is the Python 3 version.