[fix] Import error

coin/resources/models.py

@@ -5,7 +5,7 @@ from django.db import models
 from django.core.exceptions import ValidationError
 from django.core.validators import MaxValueValidator
 from netfields import CidrAddressField, NetManager
-from netaddr import IPSet
+from netaddr import IPSet, IPNetwork, IPAddress
 
 
 class IPPool(models.Model):