AttributeError: module 'horovod.torch' has no attribute 'init'

[Cow-Kite]

Environment:

1. Framework: (TensorFlow, Keras, PyTorch, MXNet): PyTorch
2. Framework version: 2.1.1+cu121
3. Horovod version: v0.28.1
4. MPI version: X
5. CUDA version: X
6. NCCL version: X
7. Python version: 3.10.12
8. Spark / PySpark version: X
9. Ray version: X
10. OS and version: Ubuntu 22.04.3 LTS
11. GCC version: 11.4.0
12. CMake version: 3.27.9

Checklist:

1. Did you search issues to find if somebody asked this question before? yes
2. If your question is about hang, did you read this doc? yes
3. If your question is about docker, did you read this doc? yes
4. Did you check if you question is answered in the [troubleshooting guide] (https://github.com/horovod/horovod/blob/master/docs/troubleshooting.rst)? yes

Bug report:
Please describe erroneous behavior you're observing and steps to reproduce it.

1. When I use this code
   import horovod.torch as hvd hvd.init()
   This error occurs
   [0]<stdout>:Extension horovod.torch has not been built: /home/sykang/.local/lib/python3.10/site-packages/horovod/torch/mpi_lib_v2.cpython-310-x86_64-linux-gnu.so not found [0]<stdout>:If this is not expected, reinstall Horovod with HOROVOD_WITH_PYTORCH=1 to debug the build error. [0]<stdout>:Warning! MPI libs are missing, but python applications are still available. [0]<stderr>:Traceback (most recent call last): [0]<stderr>: File "/home/sykang/workspace/Distributed_Training/Horovod/GCN/gcn_main.py", line 16, in <module> [0]<stderr>: hvd.init() [0]<stderr>:AttributeError: module 'horovod.torch' has no attribute 'init'

2. My installation process is as follows:
   2-1. HOROVOD_WITHOUT_MPI=1 pip install --no-cache-dir horovod
   2-2. pip install torch
   2-3. pip install torch-geometric

3. When I use "horovodrun --check-build"
   -->
   

4. "HOROVOD_WITH_PYTORCH=1 pip install --no-cache-dir horovod"
   I tried executing the command, but a build error occurred.

Is this a compatibility issue between pytorch and horovod?
I have MPI, but I want to use gloo.