import pynini
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from fun_text_processing.inverse_text_normalization.vi.graph_utils import DAMO_NOT_QUOTE, GraphFst
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from pynini.lib import pynutil
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class TelephoneFst(GraphFst):
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"""
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Finite state transducer for verbalizing telephone, e.g.
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telephone { number_part: "1231235678" }
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-> 1231235678
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"""
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def __init__(self):
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super().__init__(name="telephone", kind="verbalize")
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number_part = (
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pynutil.delete('number_part: "')
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+ pynini.closure(DAMO_NOT_QUOTE, 1)
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+ pynutil.delete('"')
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)
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delete_tokens = self.delete_tokens(number_part)
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self.fst = delete_tokens.optimize()
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