mmdet版本合适，但是报错说无法导入

我的环境配置在页面的另一个文章中

我通过下面的命令查到合适的版本后进行了安装

conda search mmdet

#查询的结果
Loading channels: done
# Name                       Version           Build  Channel
mmdet                         2.25.0    pyh2fbee01_0  conda-forge
mmdet                         2.25.0    pyh2fbee01_0  anaconda/cloud/conda-forge

最后在测试的时候发现反复出现下面的提示报错

Traceback (most recent call last):
  File "demo/top_down_img_demo_with_mmdet.py", line 138, in 
    main()
  File "demo/top_down_img_demo_with_mmdet.py", line 65, in main
    assert has_mmdet, 'Please install mmdet to run the demo.'
AssertionError: Please install mmdet to run the demo.

后来找到assert这句话，发现是

 

 然后在命令行里输入python语句

from mmdet.apis import inference_detector, init_detector

果然出现了问题

Traceback (most recent call last):
  File "__init__.pxd", line 942, in numpy.import_array
RuntimeError: module compiled against API version 0x10 but this version of numpy is 0xf

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "", line 1, in 
  File "/E/zhangyuqi/anaconda3/envs/openmmlab/lib/python3.8/site-packages/mmdet/apis/__init__.py", line 2, in 
    from .inference import (async_inference_detector, inference_detector,
  File "/E/zhangyuqi/anaconda3/envs/openmmlab/lib/python3.8/site-packages/mmdet/apis/inference.py", line 12, in 
    from mmdet.core import get_classes
  File "/E/zhangyuqi/anaconda3/envs/openmmlab/lib/python3.8/site-packages/mmdet/core/__init__.py", line 6, in 
    from .hook import *  # noqa: F401, F403
  File "/E/zhangyuqi/anaconda3/envs/openmmlab/lib/python3.8/site-packages/mmdet/core/hook/__init__.py", line 6, in 
    from .sync_norm_hook import SyncNormHook
  File "/E/zhangyuqi/anaconda3/envs/openmmlab/lib/python3.8/site-packages/mmdet/core/hook/sync_norm_hook.py", line 8, in 
    from ..utils.dist_utils import all_reduce_dict
  File "/E/zhangyuqi/anaconda3/envs/openmmlab/lib/python3.8/site-packages/mmdet/core/utils/__init__.py", line 4, in 
    from .misc import (center_of_mass, filter_scores_and_topk, flip_tensor,
  File "/E/zhangyuqi/anaconda3/envs/openmmlab/lib/python3.8/site-packages/mmdet/core/utils/misc.py", line 8, in 
    from ..mask.structures import BitmapMasks, PolygonMasks
  File "/E/zhangyuqi/anaconda3/envs/openmmlab/lib/python3.8/site-packages/mmdet/core/mask/__init__.py", line 3, in 
    from .structures import BaseInstanceMasks, BitmapMasks, PolygonMasks
  File "/E/zhangyuqi/anaconda3/envs/openmmlab/lib/python3.8/site-packages/mmdet/core/mask/structures.py", line 7, in 
    import pycocotools.mask as maskUtils
  File "/E/zhangyuqi/anaconda3/envs/openmmlab/lib/python3.8/site-packages/pycocotools-2.0.5-py3.8-linux-x86_64.egg/pycocotools/mask.py", line 3, in 
    import pycocotools._mask as _mask
  File "pycocotools/_mask.pyx", line 22, in init pycocotools._mask
  File "__init__.pxd", line 944, in numpy.import_array
ImportError: numpy.core.multiarray failed to import

这个版本的mmdet不兼容我的numpy

接下来就是安装合适的版本

pip install -U numpy 这个语句是更新，但不一定是合适的版本，我用这句得到了1.22.4版本，下载完就出现了错误提示

ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
scipy 1.7.3 requires numpy<1.23.0,>=1.16.5, but you have numpy 1.23.4 which is incompatible.

我接着又尝试了其他的版本，都是不同的包对numpy有不同的版本限制，最终功夫不负有心人，我找到了合适目前所有包和环境的版本1.23.0

再次输入上面的验证python命令，不报错了

再次祝大家早日配好环境