Add pluralize filter

apps/course/templatetags/plural.py

@@ -0,0 +1,16 @@
+from django import template
+from django.template.defaultfilters import stringfilter
+
+register = template.Library()
+
+
+@register.filter(is_safe=False)
+@stringfilter
+def rupluralize(value, arg):
+    args = arg.split(',')
+    try:
+        value = str(0 if not value or int(value) <= 0 else value)[-1:]
+        return value + ' ' + args[0 if value == '1' else (1 if value in '234' else 2)]
+    except:
+        raise template.TemplateSyntaxError
+    return ''