libpython3.3-dbg 3.3.0-2 (amd64 binary) in ubuntu raring

 Python interpreter configured with --pydebug. Dynamically loaded modules are
 searched in /usr/lib/python3.3/lib-dynload/debug first.
 .
 This package contains the library for the debug interpreter. It is normally
 not used on it's own, but as a dependency of python3.3.