python-xapian 1.4.5-1ubuntu2 (amd64 binary) in ubuntu bionic

 This package provides Xapian Python bindings for all the packaged versions
 of Python.
 .
 The Xapian search engine library is a highly adaptable toolkit which allows
 developers to easily add advanced indexing and search facilities to their own
 applications. It implements the probabilistic model of information retrieval,
 and provides facilities for performing ranked free-text searches, relevance
 feedback, phrase searching, boolean searching, stemming, and simultaneous
 update and searching. It is highly scalable, and is capable of working with
 collections containing hundreds of millions of documents.
 .
 The Xapian Python bindings provide an interface to the Xapian library from the
 Python programming language, allowing both indexing and retrieval operations.