from fun_text_processing.text_normalization.zh.graph_utils import GraphFst
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from fun_text_processing.text_normalization.zh.taggers.cardinal import Cardinal
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from pynini.lib import pynutil
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class Fraction(GraphFst):
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"""
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tokens { fraction { denominator: "5" numerator: "1" } } -> 五分之一
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"""
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def __init__(self, deterministic: bool = True, lm: bool = False):
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super().__init__(name="fraction", kind="verbalize", deterministic=deterministic)
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denominator = (
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pynutil.delete('denominator: "') + Cardinal().graph_cardinal + pynutil.delete('"')
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)
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numerator = pynutil.delete('numerator: "') + Cardinal().graph_cardinal + pynutil.delete('"')
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graph = denominator + pynutil.delete(" ") + pynutil.insert("分之") + numerator
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self.fst = self.delete_tokens(graph).optimize()
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