export_model.py export_onnx=True tuple index out of range

[xingfenghaizeiwang]

问题确认 Search before asking

• 我已经查询历史issue，没有发现相似的bug。I have searched the issues and found no similar bug report.

Bug组件 Bug Component

No response

Bug描述 Describe the Bug

python tools/export_model.py -c configs/faster_rcnn/faster_rcnn_r50_fpn_coco.yml -o weights=faster_rcnn_r50_fpn_coco.pdparams export_onnx=True __output_dir=inference_model

if sef.export_onnx:
onnx_rois_num_per = rois_num[0]

and x.shape[dim] is not None

tuple index out of range

复现环境 Environment

Windows
python 3.9.9
paddlepaddle 2.6.1
paddleDetection release 2.6

Bug描述确认 Bug description confirmation

• 我确认已经提供了Bug复现步骤、代码改动说明、以及环境信息，确认问题是可以复现的。I confirm that the bug replication steps, code change instructions, and environment information have been provided, and the problem can be reproduced.

是否愿意提交PR？ Are you willing to submit a PR?

• 我愿意提交PR！I'd like to help by submitting a PR!