* Don't force to pass a list to vDDDLists and allow setting individual RDATE

and EXDATE values without having to wrap them in a list.
* Fix encoding function to allow setting RDATE and EXDATE values and not to
  have bypass encoding with an icalendar property.

CHANGES.rst

@@ -4,6 +4,14 @@ Changelog
 3.3dev (unreleased)
 -------------------
 
+* Don't force to pass a list to vDDDLists and allow setting individual RDATE
+  and EXDATE values without having to wrap them in a list.
+  [thet]
+
+* Fix encoding function to allow setting RDATE and EXDATE values and not to
+  have bypass encoding with an icalendar property.
+  [thet]
+
 * Allow setting of timezone for vDDDLists and support timezone properties for
   RDATE and EXDATE component properties.
   [thet]

src/icalendar/cal.py

@@ -235,16 +235,19 @@ class Component(CaselessDict):
         """Conditional convertion of values.
 
         """
-        if cond:
-            klass = types_factory.for_property(name)
-            _klass = klass(value)
-            if hasattr(value, 'params') and len(value.params.keys()) > 0:
-                _klass.params = value.params
-            return _klass
-        return value
+        if not cond: return value
+        klass = types_factory.for_property(name)
+        obj = klass(value)
+        if hasattr(value, 'params') and len(value.params.keys()) > 0:
+            # TODO: How can a python native value have params?
+            obj.params = value.params
+        return obj
 
     def set(self, name, value, encode=1):
-        if type(value) == ListType:
+        if encode and type(value) == ListType\
+                and name.lower() not in ['rdate', 'exdate']:
+            # Individually convert each value to an ical type except rdate and
+            # exdate, which encoded to vDDDLists, which needs a list
             self[name] = [self._encode(name, v, encode) for v in value]
         else:
             self[name] = self._encode(name, value, encode)

src/icalendar/prop.py

@@ -340,11 +340,6 @@ class vDDDLists:
     >>> str(dt_list[2])
     '1996-04-04 01:00:00+00:00'
 
-    >>> dt_list = vDDDLists('19960402T010000Z')
-    Traceback (most recent call last):
-        ...
-    ValueError: Value MUST be a list (of date instances)
-
     >>> dt_list = vDDDLists([])
     >>> dt_list.to_ical()
     ''
@@ -357,20 +352,11 @@ class vDDDLists:
     >>> dt_list.to_ical()
     '20000101T000000,20001111T000000'
 
-    Timezone support
-    >>> from icalendar import Event
-    >>> at = pytz.timezone('Europe/Vienna')
-    >>> dt = at.localize(datetime(2013,1,29))
-    >>> event = Event()
-    >>> event.add('rdate', vDDDLists([dt]), encode=0)
-    >>> out = event.to_ical()
-    >>> assert("RDATE;TZID=Europe/Vienna:20130129T000000" in out)
-
     """
 
     def __init__(self, dt_list):
-        if not isinstance(dt_list, list):
-            raise ValueError('Value MUST be a list (of date instances)')
+        if not hasattr(dt_list, '__iter__'):
+            dt_list = [dt_list]
         vDDD = []
         tzid = None
         for dt in dt_list:

src/icalendar/tests/test_prop.py

@@ -0,0 +1,24 @@
+import datetime
+import unittest
+
+import icalendar
+import pytz
+
+
+class TestPropertyValues(unittest.TestCase):
+
+    def test_vDDDLists_timezone(self):
+        e = icalendar.Event()
+        at = pytz.timezone('Europe/Vienna')
+        dt1 = at.localize(datetime.datetime(2013,1,1))
+        dt2 = at.localize(datetime.datetime(2013,1,2))
+        dt3 = at.localize(datetime.datetime(2013,1,3))
+        e.add('rdate', [dt1, dt2])
+        e.add('exdate', dt3)
+        out = e.to_ical()
+
+        import pdb; pdb.set_trace()
+        self.assertTrue('RDATE;TZID=Europe/Vienna:20130101T000000,20130102T000000' in out)
+        self.assertTrue('EXDATE;TZID=Europe/Vienna:20130103T000000' in out)
+
+        #'BEGIN:VEVENT\r\nDTSTART;TZID=Europe/Vienna;VALUE=DATE-TIME:20130101T000000\r\nRDATE;TZID=Europe/Vienna:20130101T000000,20130102T000000\r\nEXDATE;TZID=Europe/Vienna:20130103T000000\r\nEND:VEVENT\r\n'