@unit.setter<EOL><INDENT>def unit(self, value):<DEDENT>
if isinstance(value, TimeUnit):<EOL><INDENT>self._unit = value<EOL><DEDENT>else:<EOL><INDENT>self._unit = TimeUnit(value)<EOL><DEDENT>
Change the unit for this limit to the specified unit.  The new
value may be specified as an integer, a string indicating the
number of seconds, or one of the recognized unit names.