For python ws online asr slow problem (#582)

zhaomingwork

2023-06-02 6f3b508485b8ab3817b315944730d8421c0b0b80

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from modelscope.hub.snapshot_download import snapshot_download
import sys
 
 
cache_dir = sys.argv[1]
model_dir = snapshot_download('damo/speech_xvector_sv-zh-cn-cnceleb-16k-spk3465-pytorch', cache_dir=cache_dir)