def search(self, query=None, uris=None, exact=False, **kwargs):
        """
        Search the library for tracks where ``field`` contains ``values``.
        ``field`` can be one of ``uri``, ``track_name``, ``album``, ``artist``,
        ``albumartist``, ``composer``, ``performer``, ``track_no``, ``genre``,
        ``date``, ``comment`` or ``any``.

        If ``uris`` is given, the search is limited to results from within the
        URI roots. For example passing ``uris=['file:']`` will limit the search
        to the local backend.

        Examples::

            # Returns results matching 'a' in any backend
            search({'any': ['a']})

            # Returns results matching artist 'xyz' in any backend
            search({'artist': ['xyz']})

            # Returns results matching 'a' and 'b' and artist 'xyz' in any
            # backend
            search({'any': ['a', 'b'], 'artist': ['xyz']})

            # Returns results matching 'a' if within the given URI roots
            # "file:///media/music" and "spotify:"
            search({'any': ['a']}, uris=['file:///media/music', 'spotify:'])

            # Returns results matching artist 'xyz' and 'abc' in any backend
            search({'artist': ['xyz', 'abc']})

        :param query: one or more queries to search for
        :type query: dict
        :param uris: zero or more URI roots to limit the search to
        :type uris: list of string or :class:`None`
        :param exact: if the search should use exact matching
        :type exact: :class:`bool`
        :rtype: list of :class:`mopidy.models.SearchResult`

        .. versionadded:: 1.0
            The ``exact`` keyword argument, which replaces :meth:`find_exact`.

        .. deprecated:: 1.0
            Previously, if the query was empty, and the backend could support
            it, all available tracks were returned. This has not changed, but
            it is strongly discouraged. No new code should rely on this
            behavior.

        .. deprecated:: 1.1
            Providing the search query via ``kwargs`` is no longer supported.
        """
        query = _normalize_query(query or kwargs)

        uris is None or validation.check_uris(uris)
        query is None or validation.check_query(query)
        validation.check_boolean(exact)

        if kwargs:
            deprecation.warn('core.library.search:kwargs_query')

        if not query:
            deprecation.warn('core.library.search:empty_query')

        futures = {}
        for backend, backend_uris in self._get_backends_to_uris(uris).items():
            futures[backend] = backend.library.search(
                query=query, uris=backend_uris, exact=exact)

        # Some of our tests check for LookupError to catch bad queries. This is
        # silly and should be replaced with query validation before passing it
        # to the backends.
        reraise = (TypeError, LookupError)

        results = []
        for backend, future in futures.items():
            try:
                with _backend_error_handling(backend, reraise=reraise):
                    result = future.get()
                    if result is not None:
                        validation.check_instance(result, models.SearchResult)
                        results.append(result)
            except __HOLE__:
                backend_name = backend.actor_ref.actor_class.__name__
                logger.warning(
                    '%s does not implement library.search() with "exact" '
                    'support. Please upgrade it.', backend_name)

        return results
dataset/ETHPy150Open mopidy/mopidy/mopidy/core/library.py/LibraryController.search