python3-simplejson 3.8.1-1ubuntu1 (amd64 binary) in ubuntu xenial

 simplejson is the externally maintained development version of the
 json library included with Python 2.6 and Python 3.0.
 .
 The encoder may be subclassed to provide serialization in any kind of
 situation, without any special support by the objects to be serialized
 (somewhat like pickle).
 .
 The decoder can handle incoming JSON strings of any specified encoding
 (UTF-8 by default).