BulletML: FromDocument for parity with FromElement.

[python-bulletml.git] / bulletml / parser.py

diff --git a/bulletml/parser.py b/bulletml/parser.py
index b39437a..edb9d29 100644 (file)
--- a/bulletml/parser.py
+++ b/bulletml/parser.py
@@ -443,22 +443,25 @@ class BulletML(object):
         fire=FireDef,
         )
 
-    def __init__(self, source):
+    def __init__(self, type="none", bullets={}, fires={}, actions={}):
+        self.type = type
         self.bullets = {}
         self.actions = {}
         self.fires = {}
 
-        self._bullet_refs = []
-        self._action_refs = []
-        self._fire_refs = []
-
+    @classmethod
+    def FromDocument(cls, source):
         if isinstance(source, (str, unicode)):
             source = StringIO(source)
 
         tree = ElementTree()
         root = tree.parse(source)
 
-        self.type = root.get("type", "none")
+        self = cls(type=root.get("type", "none"))
+
+        self._bullet_refs = []
+        self._action_refs = []
+        self._fire_refs = []
 
         for element in root.getchildren():
             tag = realtag(element)
@@ -483,6 +486,8 @@ class BulletML(object):
         self.actions.pop(None, None)
         self.fires.pop(None, None)
 
+        return self
+
     @property
     def top(self):
         """Get a list of all top-level actions."""