ModuleNotFoundError: No module named 'ctc_decoders'
 File "/home/mid01/anaconda3/envs/py3.8/lib/python3.8/site-packages/nemo/collections/asr/modules/beam_search_decoder.py", line 64, in __init__
    from ctc_decoders import Scorer, ctc_beam_search_decoder_batch
ModuleNotFoundError: No module named 'ctc_decoders'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "decoder_testing.py", line 38, in <module>
    beam_search = nemo_asr.modules.BeamSearchDecoderWithLM(
  File "/home/mid01/anaconda3/envs/py3.8/lib/python3.8/site-packages/nemo/collections/asr/modules/beam_search_decoder.py", line 66, in __init__
    raise ModuleNotFoundError(
ModuleNotFoundError: BeamSearchDecoderWithLM requires the installation of ctc_decoders from scripts/asr_language_modeling/ngram_lm/install_beamsearch_decoders.sh


My python version is 3.8 as https://github.com/NVIDIA/NeMo/issues/6690 said.

And I also tried 

conda create --name nemo python==3.8.10
conda activate nemo

```
# install NeMo
sudo apt-get update && apt-get install -y libsndfile1 ffmpeg
pip install Cython
git clone https://github.com/NVIDIA/NeMo
cd NeMo
./reinstall.sh

# install ctc-decoders
./scripts/asr_language_modeling/ngram_lm/install_beamsearch_decoders.sh
```

but 
./scripts/asr_language_modeling/ngram_lm/install_beamsearch_decoders.sh: line 26: cd: /workspace/nemo: No such file or directory
error occured then I get GPG error, No module named 'swig_decoders' .. 

still doesn't work.

I just want to get BeamSearchDecoder's result.
Please help me.
