old_contents: # encoding: utf-8
  from django.db import models
  import uuid
  import os
  
  
  def unique_file_name(instance, filename):
      path = 'benchmarkLogs/'
      name = str(uuid.uuid4()) + '.log'
      return os.path.join(path, name)
  
  class Picture(models.Model):
      """This is a small demo using just two fields. The slug field is really not
      necessary, but makes the code simpler. ImageField depends on PIL or
      pillow (where Pillow is easily installable in a virtualenv. If you have
      problems installing pillow, use a more generic FileField instead.
  
      """
      file = models.FileField(upload_to=unique_file_name)
      slug = models.SlugField(max_length=50, blank=True)
  
      def __unicode__(self):
          return self.file.name
  
      @models.permalink
      def get_absolute_url(self):
          return ('upload-new', )
  
      def save(self, *args, **kwargs):
          self.slug = self.file.name
          super(Picture, self).save(*args, **kwargs)
  
      def delete(self, *args, **kwargs):
          """delete -- Remove to leave file."""
          self.file.delete(False)
          super(Picture, self).delete(*args, **kwargs)
  
new_contents: # encoding: utf-8
  from django.db import models
  import uuid
  import os
  
  
  def unique_file_name(instance, filename):
      path = 'benchmarkLogs/'
      name = str(uuid.uuid4().hex) + '.log'
      return os.path.join(path, name)
  
  class Picture(models.Model):
      """This is a small demo using just two fields. The slug field is really not
      necessary, but makes the code simpler. ImageField depends on PIL or
      pillow (where Pillow is easily installable in a virtualenv. If you have
      problems installing pillow, use a more generic FileField instead.
  
      """
      file = models.FileField(upload_to=unique_file_name)
      slug = models.SlugField(max_length=50, blank=True)
  
      def __unicode__(self):
          return self.file.name
  
      @models.permalink
      def get_absolute_url(self):
          return ('upload-new', )
  
      def save(self, *args, **kwargs):
          self.slug = self.file.name
          super(Picture, self).save(*args, **kwargs)
  
      def delete(self, *args, **kwargs):
          """delete -- Remove to leave file."""
          self.file.delete(False)
          super(Picture, self).delete(*args, **kwargs)
  
subject: Make sure the filename is alphanumeric