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How to use peek_or_none method in Slash

Best Python code snippet using slash

main.py

Source:main.py

...62            yield63            pstats.Stats(pr).strip_dirs().sort_stats(SortKey.CUMULATIVE).print_stats(20)64@dynamic_commands("pkm run")65def pkm_run(cmd: Command, next_args: ArgumentsBuffer) -> List[CommandDef]:66    next_ = next_args.peek_or_none()67    context = Context.of(cmd)68    @command("", positional("cmd-and-args", n_values="*"))69    def os_exec(cmd: Command):70        if not (caa := cmd.cmd_and_args):71            raise UnsupportedOperationException("command is required to be executed")72        def on_environment(env: Environment):73            with env.activate():74                restore_cursor()75                sys.exit(execvpe(caa[0], caa[1:], os.environ))76        def on_project(project_: Project):77            on_environment(project_.attached_environment)78        context.run(**locals())79    if next_ is None or not next_.startswith("@"):80        return command_definitions_from([os_exec])81    if not (project := context.lookup_project()):82        raise UnsupportedOperationException("tasks can only be executed in project context")83    @command("", positional("task"), positional("args", n_values="*", default=[]))84    def task_exec(cmd: Command):85        TasksExecutor.execute(project, cmd.task, cmd.args)86    return command_definitions_from([task_exec])87@dynamic_commands('pkm new')88def pkm_new(_: Command, next_args: ArgumentsBuffer) -> List[CommandDef]:89    tr = TemplateRunner()90    if template_name := next_args.peek_or_none():91        try:92            return [with_gc_context(tr.load_template(template_name)).as_command(template_name)]93        except:94            ...95    names = tr.templates_in_namespace()96    if template_name and (filtered := [it for it in names if it.startswith(template_name)]):97        names = filtered98    return [with_gc_context(tr.load_template(it)).as_command(it) for it in names]99@command(100    'pkm install',101    option("-o, --optional", default=None, help="optional group to use (only for projects)"),102    flag("-f, --force", help="forcefully remove and reinstall the given pacakges"),103    flag("-a, --app", help="install package in containerized application mode"),104    flag("-u, --update", help="update the given packages if already installed"),...

iteration.py

Source:iteration.py

...17                raise StopIteration()18            return returned19        return next(self._iterator)20    __next__ = next21    def peek_or_none(self):22        if self.has_next():23            return self.peek()24        return None25    def peek(self):26        if self._peeked is _NOTHING:27            self._peeked = next(self._iterator, _END)28        if self._peeked is _END:29            raise StopIteration()30        return self._peeked31    def has_next(self):32        try:33            self.peek()34        except StopIteration:35            return False...

test_iteration.py

Source:test_iteration.py

...39            if i == len(objects) - 1:40                assert not it.has_next()41                with pytest.raises(StopIteration):42                    it.peek()43                assert it.peek_or_none() is None44            else:45                assert it.has_next()46                assert it.peek() is objects[(i + 1)]47                assert it.peek_or_none() is objects[(i + 1)]48def test_cartesian_dict():49    params = {50        'a': [1, 2, 3],51        'b': [4, 5],52        'c': [6, 7],53    }54    assert set(frozenset(x.items()) for x in iter_cartesian_dicts(params)) == \55        set(frozenset([('a', a_value), ('b', b_value), ('c', c_value)])56            for a_value, b_value, c_value in itertools.product(params['a'], params['b'], params['c']))57@pytest.fixture(params=[True, False])58def use_iterator(request):59    return request.param60@pytest.fixture61def objects(use_iterator):...

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