|
import pynini
|
from fun_text_processing.inverse_text_normalization.ko.graph_utils import DAMO_NOT_QUOTE, DAMO_SIGMA, GraphFst, delete_space
|
from pynini.lib import pynutil
|
|
|
class OrdinalFst(GraphFst):
|
"""
|
Finite state transducer for verbalizing ordinal, e.g.
|
ordinal { integer: "13" } -> 13th
|
"""
|
|
def __init__(self):
|
super().__init__(name="ordinal", kind="verbalize")
|
graph = (
|
pynutil.delete("integer:")
|
+ delete_space
|
+ pynutil.delete("\"")
|
+ pynini.closure(DAMO_NOT_QUOTE, 1)
|
+ pynutil.delete("\"")
|
)
|
convert_eleven = pynini.cross("11", "11th")
|
convert_twelve = pynini.cross("12", "12th")
|
convert_thirteen = pynini.cross("13", "13th")
|
convert_one = pynini.cross("1", "1st")
|
convert_two = pynini.cross("2", "2nd")
|
convert_three = pynini.cross("3", "3rd")
|
convert_rest = pynutil.insert("th", weight=0.01)
|
|
suffix = pynini.cdrewrite(
|
convert_eleven
|
| convert_twelve
|
| convert_thirteen
|
| convert_one
|
| convert_two
|
| convert_three
|
| convert_rest,
|
"",
|
"[EOS]",
|
DAMO_SIGMA,
|
)
|
graph = graph @ suffix
|
delete_tokens = self.delete_tokens(graph)
|
self.fst = delete_tokens.optimize()
|
