Traceback (most recent call last): File "C:/Users/vipuser/Desktop/yolov4-pytorch-master/train.py", line 456, in <module> lr_scheduler_func = get_lr_scheduler(lr_decay_type, Init_lr_fit, Min_lr_fit, UnFreeze_Epoch) File "C:\Users\vipuser\Desktop\yolov4-pytorch-master\nets\yolo_training.py", line 452, in get_lr_scheduler func = partial(yolox_warm_cos_lr ,lr, min_lr, total_iters, warmup_total_iters, warmup_lr_start, no_aug_iter) NameError: name 'partial' is not defined

这个错误是由于Python无法找到`partial`函数的定义而引起的。这个函数属于`functools`模块，因此你需要在你的代码中添加以下导入语句：

from functools import partial

然后再次运行你的代码，就应该能够解决这个问题了。