def __init__(self, target_root_block_time, target_minor_block_time):
    self.target_root_block_time = target_root_block_time
    self.target_minor_block_time = target_minor_block_time
def __init__(self, target_root_block_time, target_minor_block_time):
    self.target_root_block_time = target_root_block_time
    self.target_minor_block_time = target_minor_block_time