old_contents: from django.utils.safestring import mark_safe
  from django.utils.translation import ugettext as _
  from django.template import Library
  from math import ceil, floor
  
  register = Library()
  
  @register.filter
  def time_from_minutes(total_minutes):
      return time_from_seconds(total_minutes*60.)
  time_from_minutes.is_safe=True
  
  @register.filter
  def time_from_seconds(total_seconds):
      if total_seconds is None or type(total_seconds) not in (int, long, float):
          return ""
  
      hours, remainder = divmod(total_seconds, 3600)
      hours = int(hours)
      minutes = int(floor(remainder // 60))
      seconds = int(round(remainder - (minutes * 60)))
  
      timedata = {
          'hours':hours,
          'minutes':minutes,
          'seconds':seconds
      }
  
      if minutes == 0:
          return mark_safe(_("%(seconds)ss") % timedata)
      elif hours == 0:
          return mark_safe(_("%(minutes)sm %(seconds)ss") % timedata)
      elif seconds == 0:
          return mark_safe(_("%(hours)sh %(minutes)sm") % timedata)
      else:
          return mark_safe(_("%(hours)sh %(minutes)sm %(seconds)ss") % timedata)
  
  time_from_seconds.is_safe=True
  
new_contents: from django.utils.safestring import mark_safe
  from django.utils.translation import ugettext as _
  from django.template import Library
  from math import ceil, floor
  
  register = Library()
  
  @register.filter
  def time_from_minutes(total_minutes):
      if total_minutes is None or type(total_minutes) not in (int, long, float):
          total_minutes = 0
      return time_from_seconds(total_minutes*60.)
  time_from_minutes.is_safe=True
  
  @register.filter
  def time_from_seconds(total_seconds):
      if total_seconds is None or type(total_seconds) not in (int, long, float):
          return ""
  
      hours, remainder = divmod(total_seconds, 3600)
      hours = int(hours)
      minutes = int(floor(remainder // 60))
      seconds = int(round(remainder - (minutes * 60)))
  
      timedata = {
          'hours':hours,
          'minutes':minutes,
          'seconds':seconds
      }
  
      if minutes == 0:
          return mark_safe(_("%(seconds)ss") % timedata)
      elif hours == 0:
          return mark_safe(_("%(minutes)sm %(seconds)ss") % timedata)
      elif seconds == 0:
          return mark_safe(_("%(hours)sh %(minutes)sm") % timedata)
      else:
          return mark_safe(_("%(hours)sh %(minutes)sm %(seconds)ss") % timedata)
  
  time_from_seconds.is_safe=True
  
subject: fix Nonetype thing