Tolerate getfilesystemencoding returning None.

[wrw.git] / wrw / sp / cons.py

diff --git a/wrw/sp/cons.py b/wrw/sp/cons.py
index 168f297..1e3d678 100644 (file)
--- a/wrw/sp/cons.py
+++ b/wrw/sp/cons.py
@@ -1,3 +1,4 @@
+import sys
 import xml.dom.minidom
 
 class node(object):
@@ -39,9 +40,11 @@ class element(node):
         return self.__todom__(doc).toxml()
 
 class context(object):
+    charset = (sys.getfilesystemencoding() or "ascii")
+
     def __init__(self):
         self.nodeconv = {}
-        self.nodeconv[str] = lambda ob: text(ob, "utf-8")
+        self.nodeconv[str] = lambda ob: text(ob, self.charset)
         self.nodeconv[unicode] = text
         self.nodeconv[int] = text
         self.nodeconv[long] = text
@@ -60,10 +63,11 @@ class context(object):
         node.children.append(self.nodefrom(child))
 
     def addattr(self, node, k, v):
-        node.attrs[unicode(k)] = unicode(v)
+        if v is not None:
+            node.attrs[unicode(k)] = unicode(v)
 
 class constructor(object):
-    def __init__(self, ns, elcls = element, ctx=None):
+    def __init__(self, ns, elcls=element, ctx=None):
         self._ns = ns
         self._elcls = elcls
         if ctx is None: ctx = context()