def __init__(self, target_t, weight=<NUM_LIT>):
self.target_t = target_t<EOL>self.avg_n = <NUM_LIT:0.0><EOL>self.avg_t = <NUM_LIT:0.0><EOL>self.weight = weight<EOL>
target_t - Target time for t in update()
weight - Weight of previous n/t values