apply_on_last_branches is ok

mapytex/calculus/core/tree.py

@@ -226,17 +226,39 @@ class Tree(object):
         :param function: (op, a, a) -> b
         :returns: b if it is a 1 level Tree, Tree otherwise
 
+
+        :example:
+
+        >>> nested_par = ("+", (
+        ...    ("*", (3, 4)),
+        ...    2))
+        >>> t = Tree.from_nested_parenthesis(nested_par)
+        >>> print(t)
+        +
+         > *
+         | > 3
+         | > 4
+         > 2
+        >>> from .tree_tools import infix_str_concatenate
+        >>> tt = t.apply_on_last_branches(lambda *x: infix_str_concatenate(*x))
+        >>> print(tt)
+        +
+         > 3 * 4
+         > 2
+
         """
+        left_is_leaf = 0
+        right_is_leaf = 0
         try:
-            # TODO: to change when typify is done |dim. févr. 19 14:49:06 EAT 2017
             left_applied = self.left_value.apply_on_last_branches(function)
         except AttributeError:
+            left_applied = self.left_value
             left_is_leaf = 1
 
         try:
-            # TODO: to change when typify is done |dim. févr. 19 14:49:06 EAT 2017
+            right_applied = self.right_value.apply_on_last_branches(function)
-            left_applied = self.left_value.apply_on_last_branches(function)
         except AttributeError:
+            right_applied = self.right_value
             right_is_leaf = 1
 
         if left_is_leaf and right_is_leaf: