90 lines
3.2 KiB
Python
90 lines
3.2 KiB
Python
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import pynini
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from fun_text_processing.text_normalization.en.graph_utils import (
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DAMO_NOT_QUOTE,
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GraphFst,
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delete_preserve_order,
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delete_space,
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insert_space,
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)
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from fun_text_processing.text_normalization.es import LOCALIZATION
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from fun_text_processing.text_normalization.es.graph_utils import (
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add_cardinal_apocope_fem,
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shift_cardinal_gender,
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shift_number_gender,
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strip_cardinal_apocope,
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)
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from pynini.lib import pynutil
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class DecimalFst(GraphFst):
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"""
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Finite state transducer for classifying decimal, e.g.
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decimal { negative: "true" integer_part: "dos" fractional_part: "cuatro cero" quantity: "billones" } -> menos dos coma quatro cero billones
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decimal { integer_part: "un" quantity: "billón" } -> un billón
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Args:
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deterministic: if True will provide a single transduction option,
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for False multiple transduction are generated (used for audio-based normalization)
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"""
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def __init__(self, deterministic: bool = True):
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super().__init__(name="decimal", kind="classify", deterministic=deterministic)
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optional_sign = pynini.closure(
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pynini.cross('negative: "true"', "menos ") + delete_space, 0, 1
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)
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integer = (
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pynutil.delete('integer_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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fractional_default = (
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pynutil.delete('fractional_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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conjunction = (
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pynutil.insert(" punto ") if LOCALIZATION == "am" else pynutil.insert(" coma ")
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)
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if not deterministic:
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conjunction |= pynutil.insert(pynini.union(" con ", " y "))
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fractional_default |= strip_cardinal_apocope(fractional_default)
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fractional = conjunction + fractional_default
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quantity = (
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delete_space
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+ insert_space
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+ pynutil.delete('quantity: "')
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+ pynini.closure(DAMO_NOT_QUOTE, 1)
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+ pynutil.delete('"')
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)
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optional_quantity = pynini.closure(quantity, 0, 1)
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graph_masc = optional_sign + pynini.union(
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(integer + quantity), (integer + delete_space + fractional + optional_quantity)
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)
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# Allowing permutation for fem gender, don't include quantity since "million","billion", etc.. are masculine
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graph_fem = optional_sign + (
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shift_cardinal_gender(integer) + delete_space + shift_number_gender(fractional)
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)
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if not deterministic: # "una" will drop to "un" in certain cases
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graph_fem |= add_cardinal_apocope_fem(graph_fem)
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self.numbers_only_quantity = (
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optional_sign
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+ pynini.union(
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(integer + quantity), (integer + delete_space + fractional + quantity)
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).optimize()
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)
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self.graph_masc = (graph_masc + delete_preserve_order).optimize()
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self.graph_fem = (graph_fem + delete_preserve_order).optimize()
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graph = graph_masc | graph_fem
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graph += delete_preserve_order
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delete_tokens = self.delete_tokens(graph)
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self.fst = delete_tokens.optimize()
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