function to get age range of deputy

themis/datatypes/deputy.py

@@ -1,3 +1,5 @@
+import datetime
+
 from five import grok
 from zope import schema
 from zope.interface import implements
@@ -61,3 +63,23 @@ class Deputy(Item):
     def setTitle(self, value):
         pass
 
+    @property
+    def agerange(self):
+        today = datetime.datetime.today()
+        age = (today.year - self.birthdate.year)
+        if today.month < self.birthdate.month or \
+                (today.month == self.birthdate.month and
+                 today.day < self.birthdate.day):
+            age -= 1
+        if age < 30:
+            return '-30'
+        elif age < 40:
+            return '30-40'
+        elif age < 50:
+            return '40-50'
+        elif age < 60:
+            return '50-60'
+        elif age < 70:
+            return '60-70'
+        else:
+            return '+70'