old_contents: from django import template
  from django.conf import settings
  import base64
  import hmac, sha
  
  register = template.Library()
  
  @register.inclusion_tag('uploadify_head.html')
  def uploadify_head():
      return {
          'MEDIA_URL': settings.MEDIA_URL, 
      }
      
  @register.inclusion_tag('uploadify_widget.html')
  def uploadify_widget(options):
      return {
          'uploadify_options': options,
      }
  
  @register.inclusion_tag('uploadify_upload.html')
  def uploadify_upload(css_classes=""):
      return {
          'css_classes': css_classes,
      }
new_contents: from django import template
  from django.conf import settings
  
  register = template.Library()
  
  @register.inclusion_tag('uploadify_head.html')
  def uploadify_head():
      return {
          'MEDIA_URL': settings.MEDIA_URL, 
      }
      
  @register.inclusion_tag('uploadify_widget.html')
  def uploadify_widget(options):
      return {
          'uploadify_options': options,
      }
  
  @register.inclusion_tag('uploadify_upload.html')
  def uploadify_upload(css_classes=""):
      return {
          'css_classes': css_classes,
      }
subject: Remove unneeded imports