Update podjango model __str__ methods for newer Django

www/podjango/apps/cast/models.py

@@ -19,9 +19,9 @@
 from django.db import models
 from django.conf import settings
 from django.urls import reverse
-#from podjango.apps.staff.models import Person
 from datetime import datetime, timedelta
 
+
 class CastTag(models.Model):
     """Tagging for casts"""
 
@@ -31,12 +31,13 @@ class CastTag(models.Model):
     class Meta:
         db_table = 'cast_tags' # legacy
 
-    def __unicode__(self):
+    def __str__(self):
         return self.label
 
     def get_absolute_url(self):
         return reverse('podjango:cast') + "?tag=%s" % self.slug
 
+
 class Cast(models.Model):
     """Cast"""
 
@@ -45,7 +46,6 @@ class Cast(models.Model):
     summary = models.TextField(help_text="Use raw HTML.  This summary is not included at the beginning of the body when the entry is displayed.  It used only for the material on the front page.")
     body = models.TextField(help_text="Use raw HTML.  Include the full body of any show notes or other information about this episode.  It will be labelled on the site as Show Notes.  It is included on the detail entry, and in the description data on the cast RSS feed.")
     pub_date = models.DateTimeField()
-#    poster = models.ForeignKey(Person)
     tags = models.ManyToManyField(CastTag, blank=True)
     ogg_path = models.CharField(max_length=300, blank=True,
                              help_text="Local filename of the Ogg file, relative to webroot.  File should be uploaded into the static media area for casts.")
@@ -63,7 +63,7 @@ class Cast(models.Model):
         ordering = ('-pub_date',)
         get_latest_by = 'pub_date'
 
-    def __unicode__(self):
+    def __str__(self):
         return self.title
 
     def get_absolute_url(self):