Python wrapper geometry handling

src/ifcopenshell-python/ifcopenshell/__init__.py

@@ -60,8 +60,11 @@ from .entity_instance import entity_instance
 
 
 def open(fn):
-    return file(ifcopenshell_wrapper.open(os.path.abspath(fn)))
-
+    f = ifcopenshell_wrapper.open(os.path.abspath(fn))
+    if f.good():
+        return file(f)
+    else:
+        raise IOError("Unable to open file for reading")
 
 def create_entity(type, *args, **kwargs):
     e = entity_instance(type)

src/ifcopenshell-python/ifcopenshell/geom/main.py

@@ -91,7 +91,12 @@ class iterator(_iterator):
     if has_occ:
         def get(self):
             return wrap_shape_creation(self.settings, _iterator.get(self))
-
+            
+    def __iter__(self):
+        if self.initialize():
+            while True:
+                yield self.get()
+                if not self.next(): break
 
 class tree(ifcopenshell_wrapper.tree):