def __init__(self,  byhour=None, interval=<NUM_LIT:1>, tz=None):
if byhour is None: byhour=list(range(<NUM_LIT>))<EOL>rule = rrulewrapper(HOURLY, byhour=byhour, interval=interval,<EOL>byminute=<NUM_LIT:0>, bysecond=<NUM_LIT:0>)<EOL>RRuleLocator.__init__(self, rule, tz)<EOL>
Mark every hour in *byhour*; *byhour* can be an int or sequence.
Default is to tick every hour: ``byhour=range(24)``

*interval* is the interval between each iteration.  For
example, if ``interval=2``, mark every second occurrence.