      return val
  
  
  def readable_datetime_formats(formats):
      format = ', '.join(formats).replace(ISO_8601, 'YYYY-MM-DDThh:mm[:ss[.uuuuuu]][+HHMM|-HHMM|Z]')
      return humanize_strptime(format)
  
  
  def readable_date_formats(formats):
      format = ', '.join(formats).replace(ISO_8601, 'YYYY[-MM[-DD]]')
 
</s> remove from rest_framework.compat import timezone, parse_date, parse_datetime, parse_time
 </s> add from rest_framework.compat import (timezone, parse_date, parse_datetime,
                                   parse_time)
    format = ', '.join(formats).replace(ISO_8601,
             'YYYY-MM-DDThh:mm[:ss[.uuuuuu]][+HHMM|-HHMM|Z]')
      return val
  
  
  def readable_datetime_formats(formats):
    format = ', '.join(formats).replace(ISO_8601,
             'YYYY-MM-DDThh:mm[:ss[.uuuuuu]][+HHMM|-HHMM|Z]')
      return humanize_strptime(format)
  
  
  def readable_date_formats(formats):
      format = ', '.join(formats).replace(ISO_8601, 'YYYY[-MM[-DD]]')
keep keep keep keep replace keep keep keep keep keep
 Added humanized field names and types 
rest_framework/fields.py