Fix Python 2.7

src/z3c/rml/attr.py

@@ -144,8 +144,12 @@ class Text(RMLAttribute, zope.schema.Text):
     """A simple unicode string."""
 
 
-class String(Text):
-    """Formerly a simple Bytes string, now the same as Text."""
+if six.PY2:
+    class String(RMLAttribute, zope.schema.Bytes):
+        """A simple Bytes string."""
+else:
+    class String(Text):
+        """Formerly a simple Bytes string, now the same as Text."""
 
 
 class Integer(RMLAttribute, zope.schema.Int):

src/z3c/rml/occurence.py

@@ -14,6 +14,7 @@
 """Condition Implementation
 """
 import reportlab
+import six
 import sys
 import zope.interface
 import zope.schema
@@ -39,10 +40,16 @@ class IOccurence(zope.interface.Interface):
         description=u'The description of the occurence.',
         required=True)
 
-    tag = zope.schema.TextLine(
-        title=u'Tag',
-        description=u'The tag of the sub-directive within the directive',
-        required=True)
+    if six.PY2:
+        tag = zope.schema.BytesLine(
+            title=u'Tag',
+            description=u'The tag of the sub-directive within the directive',
+            required=True)
+    else:
+        tag = zope.schema.TextLine(
+            title=u'Tag',
+            description=u'The tag of the sub-directive within the directive',
+            required=True)
 
     signature = zope.schema.Field(
         title=u'Signature',

test-failures.txt

@@ -1,4 +1,4 @@
-Fails in all?
+Fails in Python 2 and 3
     - rml-examples-029-keepinframe.rml
 
     We've had problems with the keepinframe before: https://github.com/zopefoundation/z3c.rml/commit/bce7f7f25bda98a7101b3e2cf5b28fd988e505c9#commitcomment-2760056