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How to use iter_children_preorder method in avocado

Best Python code snippet using avocado_python

tree.py

Source:tree.py

...220                else:221                    raise ValueError("Path %s does not exists in this tree\n%s"222                                     % (path, tree_view(self.root)))223        return node224    def iter_children_preorder(self):225        """ Iterate through children """226        queue = collections.deque()227        node = self228        while node is not None:229            yield node230            queue.extendleft(reversed(node.children))231            try:232                node = queue.popleft()233            except IndexError:234                node = None235    def iter_leaves(self):236        """ Iterate through leaf nodes """237        for node in self.iter_children_preorder():238            if node.is_leaf:239                yield node240    def get_leaves(self):241        """ Get list of leaf nodes """242        return list(self.iter_leaves())243    def detach(self):244        """ Detach this node from parent """245        if self.parent:246            self.parent.children.remove(self)247            self.parent = None248        return self249def path_parent(path):250    """251    From a given path, return its parent path.252    :param path: the node path as string.253    :return: the parent path as string.254    """255    parent = path.rpartition('/')[0]256    if not parent:257        return '/'258    return parent259def apply_filters(tree, filter_only=None, filter_out=None):260    """261    Apply a set of filters to the tree.262    The basic filtering is filter only, which includes nodes,263    and the filter out rules, that exclude nodes.264    Note that filter_out is stronger than filter_only, so if you filter out265    something, you could not bypass some nodes by using a filter_only rule.266    :param filter_only: the list of paths which will include nodes.267    :param filter_out: the list of paths which will exclude nodes.268    :return: the original tree minus the nodes filtered by the rules.269    """270    if filter_only is None:271        filter_only = []272    else:273        filter_only = [_.rstrip('/') for _ in filter_only if _]274    if filter_out is None:275        filter_out = []276    else:277        filter_out = [_.rstrip('/') for _ in filter_out if _]278    for node in tree.iter_children_preorder():279        keep_node = True280        for path in filter_only:281            if path == '':282                continue283            if node.path == path:284                keep_node = True285                break286            if node.parent and node.parent.path == path_parent(path):287                keep_node = False288                continue289        for path in filter_out:290            if path == '':291                continue292            if node.path == path:...

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