[Bug] Fail to run mmpose due to issues in mmcv._ext

[bigpineappleking]

Prerequisite

• I have searched Issues and Discussions but cannot get the expected help.
• The bug has not been fixed in the latest version(https://github.com/open-mmlab/mmcv).

Environment

OrderedDict([('sys.platform', 'linux'), ('Python', '3.8.19 (default, Mar 20 2024, 19:58:24) [GCC 11.2.0]'), ('CUDA available', False), ('MUSA available', False), ('numpy_random_seed', 2147483648), ('GCC', 'gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-22)'), ('PyTorch', '2.3.1+cu121'), ('PyTorch compiling details', 'PyTorch built with:\n - GCC 9.3\n - C++ Version: 201703\n - Intel(R) oneAPI Math Kernel Library Version 2022.2-Product Build 20220804 for Intel(R) 64 architecture applications\n - Intel(R) MKL-DNN v3.3.6 (Git Hash 86e6af5974177e513fd3fee58425e1063e7f1361)\n - OpenMP 201511 (a.k.a. OpenMP 4.5)\n - LAPACK is enabled (usually provided by MKL)\n - NNPACK is enabled\n - CPU capability usage: AVX512\n - Build settings: BLAS_INFO=mkl, BUILD_TYPE=Release, CUDA_VERSION=12.1, CUDNN_VERSION=8.9.2, CXX_COMPILER=/opt/rh/devtoolset-9/root/usr/bin/c++, CXX_FLAGS= -D_GLIBCXX_USE_CXX11_ABI=0 -fabi-version=11 -fvisibility-inlines-hidden -DUSE_PTHREADPOOL -DNDEBUG -DUSE_KINETO -DLIBKINETO_NOROCTRACER -DUSE_FBGEMM -DUSE_QNNPACK -DUSE_PYTORCH_QNNPACK -DUSE_XNNPACK -DSYMBOLICATE_MOBILE_DEBUG_HANDLE -O2 -fPIC -Wall -Wextra -Werror=return-type -Werror=non-virtual-dtor -Werror=bool-operation -Wnarrowing -Wno-missing-field-initializers -Wno-type-limits -Wno-array-bounds -Wno-unknown-pragmas -Wno-unused-parameter -Wno-unused-function -Wno-unused-result -Wno-strict-overflow -Wno-strict-aliasing -Wno-stringop-overflow -Wsuggest-override -Wno-psabi -Wno-error=pedantic -Wno-error=old-style-cast -Wno-missing-braces -fdiagnostics-color=always -faligned-new -Wno-unused-but-set-variable -Wno-maybe-uninitialized -fno-math-errno -fno-trapping-math -Werror=format -Wno-stringop-overflow, LAPACK_INFO=mkl, PERF_WITH_AVX=1, PERF_WITH_AVX2=1, PERF_WITH_AVX512=1, TORCH_VERSION=2.3.1, USE_CUDA=ON, USE_CUDNN=ON, USE_CUSPARSELT=1, USE_EXCEPTION_PTR=1, USE_GFLAGS=OFF, USE_GLOG=OFF, USE_GLOO=ON, USE_MKL=ON, USE_MKLDNN=ON, USE_MPI=OFF, USE_NCCL=1, USE_NNPACK=ON, USE_OPENMP=ON, USE_ROCM=OFF, USE_ROCM_KERNEL_ASSERT=OFF, \n'), ('TorchVision', '0.18.1+cu121'), ('OpenCV', '4.10.0'), ('MMEngine', '0.10.5'), ('MMCV', '2.1.0'), ('MMCV Compiler', 'n/a'), ('MMCV CUDA Compiler', 'n/a')])

Installed mmcv==2.1.0 using pip inside a conda environment

Reproduces the problem - code sample

from mmpose.apis import (_track_by_iou, _track_by_oks,
convert_keypoint_definition, extract_pose_sequence,
inference_pose_lifter_model, inference_topdown,
init_model)

Reproduces the problem - command or script

start python

Reproduces the problem - error message

/dartfs-hpc/rc/home/p/f006zjp/.conda/envs/mmpose_new/lib/python3.8/site-packages/mmcv/cnn/bricks/transformer.py:33: UserWarning: Fail to import MultiScaleDeformableAttention from mmcv.ops.multi_scale_deform_attn, You should install mmcv rather than mmcv-lite if you need this module.
warnings.warn('Fail to import MultiScaleDeformableAttention from '
Traceback (most recent call last):
File "", line 1, in
File "/dartfs-hpc/rc/home/p/f006zjp/.conda/envs/mmpose_new/lib/python3.8/site-packages/mmpose/apis/init.py", line 2, in
from .inference import (collect_multi_frames, inference_bottomup,
File "/dartfs-hpc/rc/home/p/f006zjp/.conda/envs/mmpose_new/lib/python3.8/site-packages/mmpose/apis/inference.py", line 17, in
from mmpose.models.builder import build_pose_estimator
File "/dartfs-hpc/rc/home/p/f006zjp/.conda/envs/mmpose_new/lib/python3.8/site-packages/mmpose/models/init.py", line 8, in
from .heads import * # noqa
File "/dartfs-hpc/rc/home/p/f006zjp/.conda/envs/mmpose_new/lib/python3.8/site-packages/mmpose/models/heads/init.py", line 11, in
from .transformer_heads import EDPoseHead
File "/dartfs-hpc/rc/home/p/f006zjp/.conda/envs/mmpose_new/lib/python3.8/site-packages/mmpose/models/heads/transformer_heads/init.py", line 2, in
from .edpose_head import EDPoseHead
File "/dartfs-hpc/rc/home/p/f006zjp/.conda/envs/mmpose_new/lib/python3.8/site-packages/mmpose/models/heads/transformer_heads/edpose_head.py", line 14, in
from mmcv.ops import MultiScaleDeformableAttention
File "/dartfs-hpc/rc/home/p/f006zjp/.conda/envs/mmpose_new/lib/python3.8/site-packages/mmcv/ops/init.py", line 3, in
from .active_rotated_filter import active_rotated_filter
File "/dartfs-hpc/rc/home/p/f006zjp/.conda/envs/mmpose_new/lib/python3.8/site-packages/mmcv/ops/active_rotated_filter.py", line 10, in
ext_module = ext_loader.load_ext(
File "/dartfs-hpc/rc/home/p/f006zjp/.conda/envs/mmpose_new/lib/python3.8/site-packages/mmcv/utils/ext_loader.py", line 13, in load_ext
ext = importlib.import_module('mmcv.' + name)
File "/dartfs-hpc/rc/home/p/f006zjp/.conda/envs/mmpose_new/lib/python3.8/importlib/init.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
ModuleNotFoundError: No module named 'mmcv._ext'

Additional information

https://github.com/open-mmlab/mmpose/blob/main/demo/body3d_pose_lifter_demo.py

Fail to run mmpose

[HAOCHENYE]

/dartfs-hpc/rc/home/p/f006zjp/.conda/envs/mmpose_new/lib/python3.8/site-packages/mmcv/cnn/bricks/transformer.py:33: UserWarning: Fail to import MultiScaleDeformableAttention from mmcv.ops.multi_scale_deform_attn, You should install mmcv rather than mmcv-lite if you need this module.

As the warning says, you should install mmcv rather than mmcv-lite