整理格式，增加提交列表的用户名

utils/templatetags/user.py

@@ -0,0 +1,17 @@
+# coding=utf-8
+import datetime
+from account.models import User
+
+
+def get_username(user_id):
+    try:
+        return User.objects.get(id=user_id).username
+    except User.DoesNotExist:
+        return ""
+
+
+from django import template
+
+register = template.Library()
+register.filter("get_username", get_username)
+