mmcv [Bug] ImportError: cannot import name 'digit

Prerequisite

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

Environment

/home/shaunaks/miniconda3/envs/vidharm/lib/python3.8/site-packages/mmengine/optim/optimizer/zero_optimizer.py:11: DeprecationWarning: TorchScript support for functional optimizers is deprecated and will be removed in a future PyTorch release. Consider using the torch.compile optimizer instead. from torch.distributed.optim import
OrderedDict([('sys.platform', 'linux'), ('Python', '3.8.20 (default, Oct 3 2024, 15:24:27) [GCC 11.2.0]'), ('CUDA available', True), ('MUSA available', False), ('numpy_random_seed', 2147483648), ('GPU 0,1,2,3', 'NVIDIA GeForce GTX 1080 Ti'), ('CUDA_HOME', '/usr'), ('NVCC', 'Cuda compilation tools, release 12.2, V12.2.140'), ('GCC', 'gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0'), ('PyTorch', '2.4.1+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 v3.4.2 (Git Hash 1137e04ec0b5251ca2b4400a4fd3c667ce843d67)\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: AVX2\n - CUDA Runtime 12.1\n - NVCC architecture flags: -gencode;arch=compute_50,code=sm_50;-gencode;arch=compute_60,code=sm_60;-gencode;arch=compute_70,code=sm_70;-gencode;arch=compute_75,code=sm_75;-gencode;arch=compute_80,code=sm_80;-gencode;arch=compute_86,code=sm_86;-gencode;arch=compute_90,code=sm_90\n - CuDNN 90.1 (built against CUDA 12.4)\n - Magma 2.6.1\n - Build settings: BLAS_INFO=mkl, BUILD_TYPE=Release, CUDA_VERSION=12.1, CUDNN_VERSION=9.1.0, 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_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=2.4.1, 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', '0.19.1+cu121'), ('OpenCV', '4.10.0'), ('MMEngine', '0.10.5'), ('MMCV', '2.1.0'), ('MMCV Compiler', 'GCC 11.4'), ('MMCV CUDA Compiler', '12.2')])

Reproduces the problem - code sample

import torch
from mmaction.apis import init_recognizer, inference_recognizer

config_file = 'configs/recognition/tsn/tsn_r50_video_inference_1x1x3_100e_kinetics400_rgb.py'
device = 'cuda:0' # or 'cpu'
device = torch.device(device)

model = init_recognizer(config_file, device=device)
# inference the demo video
inference_recognizer(model, 'demo/demo.mp4')

Reproduces the problem - command or script

N/A

Reproduces the problem - error message

ImportError                               Traceback (most recent call last)
Cell In[4], line 1
----> 1 import mmaction

File ~/Vidharm/is-this-harmful/mmaction/__init__.py:2
      1 import mmcv
----> 2 from mmcv import digit_version
      4 from .version import __version__
      6 mmcv_minimum_version = '1.1.1'

ImportError: cannot import name 'digit_version' from 'mmcv' (/home/shaunaks/miniconda3/envs/vidharm/lib/python3.8/site-packages/mmcv/__init__.py)

Additional information

No response

Nov 11 '24 21:11 shaunakjoshi12

I am facing the same error. Did you found some soliution?

Feb 10 '25 13:02 AmanVerma2307

Did you found sol?

Mar 25 '25 16:03 pargaimanish

I have almost the same issue. What I did for installation:

#!/bin/bash -x

set -e

CUDA_VERSION=11.8

export CUDA_HOME=/usr/local/cuda-$CUDA_VERSION
export PATH=$CUDA_HOME/bin:$PATH
export LD_LIBRARY_PATH=$CUDA_HOME/lib64:$LD_LIBRARY_PATH

uv venv --python 3.8
source .venv/bin/activate

uv pip install torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cu118
uv pip install setuptools tomli platformdirs
uv pip install -U openmim
mim install mmengine
mim install mmcv
mim install mmdet

git clone https://github.com/open-mmlab/mmocr.git
cd mmocr
uv pip install -e .

Then inside the Python interpreter: from mmocr.apis import MMOCRInferencer as suggested in https://mmocr.readthedocs.io/en/stable/get_started/install.html#verify-the-installation which resulted in ImportError: cannot import name 'digit_version' from 'mmocr' (unknown location)

Apr 03 '25 12:04 matthimatik

I use mmengine instead of the mmocr from mmengine import digit_version

Aug 13 '25 06:08 azuredsky

[Bug] ImportError: cannot import name 'digit_version' from 'mmcv'

Prerequisite

Environment

Reproduces the problem - code sample

Reproduces the problem - command or script

Reproduces the problem - error message

Additional information