# Copyright NeMo (https://github.com/NVIDIA/NeMo). All Rights Reserved.
|
#
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
# you may not use this file except in compliance with the License.
|
# You may obtain a copy of the License at
|
#
|
# http://www.apache.org/licenses/LICENSE-2.0
|
#
|
# Unless required by applicable law or agreed to in writing, software
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
# See the License for the specific language governing permissions and
|
# limitations under the License.
|
|
import pynini
|
from fun_text_processing.text_normalization.de.utils import get_abs_path, load_labels
|
from fun_text_processing.text_normalization.en.graph_utils import (
|
DAMO_NOT_QUOTE,
|
DAMO_SIGMA,
|
GraphFst,
|
delete_preserve_order,
|
)
|
from pynini.lib import pynutil
|
|
|
class DateFst(GraphFst):
|
"""
|
Finite state transducer for verbalizing date, e.g.
|
date { day: "vier" month: "april" year: "zwei tausend zwei" } -> "vierter april zwei tausend zwei"
|
date { day: "vier" month: "mai" year: "zwei tausend zwei" } -> "vierter mai zwei tausend zwei"
|
|
Args:
|
ordinal: ordinal verbalizer GraphFst
|
deterministic: if True will provide a single transduction option,
|
for False multiple transduction are generated (used for audio-based normalization)
|
"""
|
|
def __init__(self, ordinal: GraphFst, deterministic: bool = True):
|
super().__init__(name="date", kind="verbalize", deterministic=deterministic)
|
|
day_cardinal = pynutil.delete("day: \"") + pynini.closure(DAMO_NOT_QUOTE, 1) + pynutil.delete("\"")
|
day = day_cardinal @ pynini.cdrewrite(ordinal.ordinal_stem, "", "[EOS]", DAMO_SIGMA) + pynutil.insert("ter")
|
|
months_names = pynini.union(*[x[1] for x in load_labels(get_abs_path("data/months/abbr_to_name.tsv"))])
|
month = pynutil.delete("month: \"") + pynini.closure(DAMO_NOT_QUOTE, 1) + pynutil.delete("\"")
|
final_month = month @ months_names
|
final_month |= month @ pynini.difference(DAMO_SIGMA, months_names) @ pynini.cdrewrite(
|
ordinal.ordinal_stem, "", "[EOS]", DAMO_SIGMA
|
) + pynutil.insert("ter")
|
|
year = pynutil.delete("year: \"") + pynini.closure(DAMO_NOT_QUOTE, 1) + pynutil.delete("\"")
|
|
# day month year
|
graph_dmy = day + pynini.accep(" ") + final_month + pynini.closure(pynini.accep(" ") + year, 0, 1)
|
graph_dmy |= final_month + pynini.accep(" ") + year
|
|
self.graph = graph_dmy | year
|
final_graph = self.graph + delete_preserve_order
|
|
delete_tokens = self.delete_tokens(final_graph)
|
self.fst = delete_tokens.optimize()
|
