add function IsPunc

雾聪

2023-06-28 049e0c35238f32359c2bba8156ffd9e1f033a4f0

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beam_size: 5
penalty: 0.0
maxlenratio: 0.0
minlenratio: 0.0
ctc_weight: 0.5
lm_weight: 0.7