def get_installed_pypackages():
    return {p.project_name.lower(): p for p in pkg_resources.working_set}
def normalizerootdir(dir, funcname):
    if dir == ".":
        util.nouideprecwarn(
            "match.%s() no longer accepts '.', use '' instead." % funcname, "20190805"
        )
        return ""
    return dir