问题描述

在训练模型的过程中遇到了apex库的报错IndexError: tuple index out of range导致无法训练。在github查询后找到了解决方法

问题解决

需要修改/apex-master/apex/amp/utils.py这个文件的代码
从93行开始修改

if x in cache:
        cached_x = cache[x]
        next_functions_available = False
        if x.requires_grad and cached_x.requires_grad:
            if len(cached_x.grad_fn.next_functions) > 1:
                next_functions_available = True
            # Make sure x is actually cached_x's autograd parent.
            if next_functions_available and cached_x.grad_fn.next_functions[1][0].variable is not x:

 elif x.requires_grad and cached_x.requires_grad and not next_functions_available:
            del cache[x]