code: def _from_xapian_value(value, field_type):
      
      assert field_type in FIELD_TYPES
      if field_type == 'boolean':
          if value == 't':
              return True
          elif value == 'f':
              return False
          else:
              InvalidIndexError('Field type "%d" does not accept value "%s"' % (field_type, value))
      elif field_type == 'integer':
          return int(value)
      elif field_type == 'float':
          return xapian.sortable_unserialise(value)
      elif field_type == 'date' or field_type == 'datetime':
          datetime_value = datetime.datetime.strptime(value, DATETIME_FORMAT)
          if field_type == 'datetime':
              return datetime_value
          else:
              return datetime_value.date()
      else:  # field_type == 'text'
          return value
docs: Converts a serialized Xapian value
      to Python equivalent based on the field_type.
  
      Doesn't accept multivalued fields.