|
import pynini
|
from fun_text_processing.inverse_text_normalization.fr.graph_utils import (
|
DAMO_NOT_QUOTE,
|
GraphFst,
|
delete_space,
|
insert_space,
|
)
|
from pynini.lib import pynutil
|
|
|
class FractionFst(GraphFst):
|
"""
|
Finite state transducer for verbalizing fraction
|
e.g. fraction { integer_part: "1" numerator: "2" denominator: "3" } } -> 1 2/3
|
|
"""
|
|
def __init__(self):
|
super().__init__(name="fraction", kind="verbalize")
|
optional_sign = pynini.closure(pynini.cross("negative: \"true\"", "-") + delete_space, 0, 1)
|
integer = (
|
pynutil.delete("integer_part: \"")
|
+ pynini.closure(DAMO_NOT_QUOTE, 1)
|
+ pynutil.delete("\"")
|
+ insert_space
|
)
|
numerator = pynutil.delete("numerator: \"") + pynini.closure(DAMO_NOT_QUOTE, 1) + pynutil.delete("\"")
|
|
denominator = (
|
pynutil.insert('/')
|
+ pynutil.delete("denominator: \"")
|
+ pynini.closure(DAMO_NOT_QUOTE, 1)
|
+ pynutil.delete("\"")
|
)
|
|
graph = (pynini.closure(integer + delete_space, 0, 1) + numerator + delete_space + denominator).optimize()
|
self.numbers = graph
|
delete_tokens = self.delete_tokens(optional_sign + graph)
|
self.fst = delete_tokens.optimize()
|
