def get_impl_ver():<EOL>
impl_ver = get_config_var("<STR_LIT>")<EOL>if not impl_ver or get_abbr_impl() == '<STR_LIT>':<EOL><INDENT>impl_ver = '<STR_LIT>'.join(map(str, get_impl_version_info()))<EOL><DEDENT>return impl_ver<EOL>
Return implementation version.