code: def get_lr(self):
      if self.last_epoch == 0:
          return self.base_lr
      reletive_epoch = self.last_epoch % self.cycle
      lr = self.eta_min + 0.5 * (self.base_lr - self.eta_min) * (
          1 + math.cos(math.pi * reletive_epoch / self.cycle)
      )
      return lr
  
file_path: PaddleOCR/ppocr/optimizer/lr_scheduler.py
imports: import math
  from paddle.optimizer.lr import LRScheduler
label_desc: Use image node_id 2 for calling the CyclicalCosineDecay obj's underlying member method code with example usage: obj.get_lr() and returns: lr, self