diff options
-rw-r--r-- | libbe/tree.py | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/libbe/tree.py b/libbe/tree.py index 0256407..45ae085 100644 --- a/libbe/tree.py +++ b/libbe/tree.py @@ -68,7 +68,18 @@ class Tree(list): f h i + >>> a.has_descendant(g) + True + >>> c.has_descendant(g) + False + >>> a.has_descendant(a) + False + >>> a.has_descendant(a, match_self=True) + True """ + def __eq__(self, other): + return id(self) == id(other) + def branch_len(self): """ Exhaustive search every time == SLOW. @@ -157,4 +168,12 @@ class Tree(list): yield (depth,node) stack.append(node) + def has_descendant(self, descendant, depth_first=True, match_self=False): + if descendant == self: + return match_self + for d in self.traverse(depth_first): + if descendant == d: + return True + return False + suite = doctest.DocTestSuite() |