def get_ext(self, obj=None):
        """Return the file extension

        :param obj: the fileinfo with information. If None, this will use the stored object of JB_File
        :type obj: :class:`FileInfo`
        :returns: the file extension
        :rtype: str
        :raises: None
        """
        if obj is None:
            obj = self._obj
        return self._extel.get_ext(obj)
def get_ext ( self , obj = None ) : if obj is None : obj = self . _obj return self . _extel . get_ext ( obj )
Return the file extension

        :param obj: the fileinfo with information. If None, this will use the stored object of JB_File
        :type obj: :class:`FileInfo`
        :returns: the file extension
        :rtype: str
        :raises: None