import pynini
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from fun_text_processing.text_normalization.de.utils import get_abs_path, load_labels
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from fun_text_processing.text_normalization.en.graph_utils import (
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DAMO_ALPHA,
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DAMO_DIGIT,
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DAMO_SIGMA,
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GraphFst,
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convert_space,
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insert_space,
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)
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from pynini.lib import pynutil
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min_singular = pynini.string_file(get_abs_path("data/money/currency_minor_singular.tsv"))
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min_plural = pynini.string_file(get_abs_path("data/money/currency_minor_plural.tsv"))
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maj_singular = pynini.string_file((get_abs_path("data/money/currency.tsv")))
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class MoneyFst(GraphFst):
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"""
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Finite state transducer for classifying money, e.g.
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"€1" -> money { currency_maj: "euro" integer_part: "ein"}
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"€1,000" -> money { currency_maj: "euro" integer_part: "ein" }
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"€1,001" -> money { currency_maj: "euro" integer_part: "eins" fractional_part: "null null eins"}
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"£1,4" -> money { integer_part: "ein" currency_maj: "pfund" fractional_part: "vierzig" preserve_order: true}
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-> money { integer_part: "ein" currency_maj: "pfund" fractional_part: "vierzig" currency_min: "pence" preserve_order: true}
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"£0,01" -> money { fractional_part: "ein" currency_min: "penny" preserve_order: true}
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"£0,01 million" -> money { currency_maj: "pfund" integer_part: "null" fractional_part: "null eins" quantity: "million"}
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Args:
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cardinal: CardinalFst
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decimal: DecimalFst
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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, cardinal: GraphFst, decimal: GraphFst, deterministic: bool = True):
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super().__init__(name="money", kind="classify", deterministic=deterministic)
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cardinal_graph = cardinal.graph
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graph_decimal_final = decimal.fst
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maj_singular_labels = load_labels(get_abs_path("data/money/currency.tsv"))
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maj_singular_graph = convert_space(maj_singular)
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maj_plural_graph = maj_singular_graph
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graph_maj_singular = (
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pynutil.insert('currency_maj: "') + maj_singular_graph + pynutil.insert('"')
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)
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graph_maj_plural = (
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pynutil.insert('currency_maj: "') + maj_plural_graph + pynutil.insert('"')
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)
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optional_delete_fractional_zeros = pynini.closure(
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pynutil.delete(",") + pynini.closure(pynutil.delete("0"), 1), 0, 1
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)
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graph_integer_one = (
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pynutil.insert('integer_part: "') + pynini.cross("1", "ein") + pynutil.insert('"')
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)
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# only for decimals where third decimal after comma is non-zero or with quantity
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decimal_delete_last_zeros = (
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pynini.closure(DAMO_DIGIT, 1)
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+ pynini.accep(",")
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+ pynini.closure(DAMO_DIGIT, 2)
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+ (DAMO_DIGIT - "0")
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+ pynini.closure(pynutil.delete("0"))
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)
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decimal_with_quantity = DAMO_SIGMA + DAMO_ALPHA
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graph_decimal = (
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graph_maj_plural
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+ insert_space
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+ (decimal_delete_last_zeros | decimal_with_quantity) @ graph_decimal_final
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)
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graph_integer = (
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pynutil.insert('integer_part: "')
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+ ((DAMO_SIGMA - "1") @ cardinal_graph)
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+ pynutil.insert('"')
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)
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graph_integer_only = graph_maj_singular + insert_space + graph_integer_one
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graph_integer_only |= graph_maj_plural + insert_space + graph_integer
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graph = (graph_integer_only + optional_delete_fractional_zeros) | graph_decimal
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# remove trailing zeros of non zero number in the first 2 digits and fill up to 2 digits
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# e.g. 2000 -> 20, 0200->02, 01 -> 01, 10 -> 10
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# not accepted: 002, 00, 0,
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two_digits_fractional_part = (
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pynini.closure(DAMO_DIGIT) + (DAMO_DIGIT - "0") + pynini.closure(pynutil.delete("0"))
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) @ (
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(pynutil.delete("0") + (DAMO_DIGIT - "0"))
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| ((DAMO_DIGIT - "0") + pynutil.insert("0"))
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| ((DAMO_DIGIT - "0") + DAMO_DIGIT)
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)
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graph_min_singular = pynutil.insert(' currency_min: "') + min_singular + pynutil.insert('"')
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graph_min_plural = pynutil.insert(' currency_min: "') + min_plural + pynutil.insert('"')
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# format ** euro ** cent
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decimal_graph_with_minor = None
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for curr_symbol, _ in maj_singular_labels:
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preserve_order = pynutil.insert(" preserve_order: true")
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integer_plus_maj = (
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graph_integer + insert_space + pynutil.insert(curr_symbol) @ graph_maj_plural
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)
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integer_plus_maj |= (
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graph_integer_one + insert_space + pynutil.insert(curr_symbol) @ graph_maj_singular
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)
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# non zero integer part
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integer_plus_maj = (pynini.closure(DAMO_DIGIT) - "0") @ integer_plus_maj
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graph_fractional_one = two_digits_fractional_part @ pynini.cross("1", "ein")
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graph_fractional_one = (
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pynutil.insert('fractional_part: "') + graph_fractional_one + pynutil.insert('"')
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)
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graph_fractional = (
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two_digits_fractional_part
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@ (pynini.closure(DAMO_DIGIT, 1, 2) - "1")
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@ cardinal.two_digit_non_zero
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)
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graph_fractional = (
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pynutil.insert('fractional_part: "') + graph_fractional + pynutil.insert('"')
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)
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fractional_plus_min = (
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graph_fractional + insert_space + pynutil.insert(curr_symbol) @ graph_min_plural
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)
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fractional_plus_min |= (
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graph_fractional_one
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+ insert_space
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+ pynutil.insert(curr_symbol) @ graph_min_singular
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)
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decimal_graph_with_minor_curr = (
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integer_plus_maj + pynini.cross(",", " ") + fractional_plus_min
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)
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decimal_graph_with_minor_curr |= pynutil.add_weight(
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integer_plus_maj
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+ pynini.cross(",", " ")
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+ pynutil.insert('fractional_part: "')
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+ two_digits_fractional_part @ cardinal.two_digit_non_zero
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+ pynutil.insert('"'),
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weight=0.0001,
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)
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decimal_graph_with_minor_curr |= pynutil.delete("0,") + fractional_plus_min
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decimal_graph_with_minor_curr = (
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pynutil.delete(curr_symbol) + decimal_graph_with_minor_curr + preserve_order
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)
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decimal_graph_with_minor = (
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decimal_graph_with_minor_curr
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if decimal_graph_with_minor is None
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else pynini.union(decimal_graph_with_minor, decimal_graph_with_minor_curr)
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)
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final_graph = graph | decimal_graph_with_minor
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final_graph = self.add_tokens(final_graph)
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self.fst = final_graph.optimize()
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