Let date_string_to_date raise ValueError instead of returning None.

topydo/lib/DoCommand.py

@@ -41,7 +41,10 @@ class DoCommand(DCommand):
         if p_opt == "-s" or p_opt == "--strict":
             self.strict_recurrence = True
         elif p_opt == "-d" or p_opt == "--date":
-            self.completion_date = date_string_to_date(p_value) or date.today()
+            try:
+                self.completion_date = date_string_to_date(p_value)
+            except ValueError:
+                self.completion_date = date.today()
 
     def _handle_recurrence(self):
         if self.todo.has_tag('rec'):

topydo/lib/Filter.py

@@ -175,8 +175,6 @@ class OrdinalTagFilter(Filter):
             if not operand2:
                 operand2 = date_string_to_date(self.value)
 
-            if not operand1 or not operand2:
-                raise ValueError
         except ValueError:
             try:
                 operand1 = int(p_todo.tag_value(self.key))

topydo/lib/Todo.py

@@ -37,7 +37,14 @@ class Todo(TodoBase):
     def get_date(self, p_tag):
         """ Given a date tag, return a date object. """
         string = self.tag_value(p_tag)
-        return date_string_to_date(string) if string else None
+        result = None
+
+        try:
+            result = date_string_to_date(string) if string else None
+        except ValueError:
+            pass
+
+        return result
 
     def start_date(self):
         """ Returns a date object of the todo's start date. """

topydo/lib/Utils.py

@@ -31,14 +31,13 @@ def date_string_to_date(p_date):
     if p_date:
         parsed_date = re.match(r'(\d{4})-(\d{2})-(\d{2})', p_date)
         if parsed_date:
-            try:
             result = date(
                 int(parsed_date.group(1)), # year
                 int(parsed_date.group(2)), # month
                 int(parsed_date.group(3))  # day
             )
-            except ValueError:
-                result = None
+        else:
+            raise ValueError
 
     return result