用Notebook项目的2.0.0rc框架跑PaddleDetection任务，预测时报下面的错误，查了之后发现是Numpy版本问题，把numpy-1.19.4降到了numpy-1.17.0，问题解决……

解决办法如下：

# 调整Numpy版本
!pip install -U numpy==1.17.0

注意：Notebook内置的框架是Numpy 1.16，应该是没问题的。但是要注意不要在下其它依赖包的时候升级了Numpy版本。

报错信息长这样：

raceback (most recent call last):
  File "tools/train.py", line 399, in 
    main()
  File "tools/train.py", line 320, in main
    cfg['EvalReader']['dataset'])
  File "/home/aistudio/PaddleDetection/ppdet/utils/eval_utils.py", line 241, in eval_results
    save_only=save_only)
  File "/home/aistudio/PaddleDetection/ppdet/utils/coco_eval.py", line 102, in bbox_eval
    map_stats = cocoapi_eval(outfile, 'bbox', coco_gt=coco_gt)
  File "/home/aistudio/PaddleDetection/ppdet/utils/coco_eval.py", line 244, in cocoapi_eval
    coco_eval = COCOeval(coco_gt, coco_dt, style)
  File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/pycocotools-2.0-py3.7-linux-x86_64.egg/pycocotools/cocoeval.py", line 75, in __init__
    self.params = Params(iouType=iouType) # parameters
  File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/pycocotools-2.0-py3.7-linux-x86_64.egg/pycocotools/cocoeval.py", line 527, in __init__
    self.setDetParams()
  File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/pycocotools-2.0-py3.7-linux-x86_64.egg/pycocotools/cocoeval.py", line 506, in setDetParams
    self.iouThrs = np.linspace(.5, 0.95, np.round((0.95 - .5) / .05) + 1, endpoint=True)
  File "<__array_function__ internals>", line 6, in linspace
  File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/numpy/core/function_base.py", line 113, in linspace
    num = operator.index(num)
TypeError: 'numpy.float64' object cannot be interpreted as an integer
terminate called without an active exception