# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import pynini
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from fun_text_processing.inverse_text_normalization.zh.graph_utils import DAMO_CHAR, DAMO_SIGMA, GraphFst, delete_space
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from pynini.lib import pynutil
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class WordFst(GraphFst):
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"""
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Finite state transducer for verbalizing plain tokens
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e.g. tokens { name: "sleep" } -> sleep
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"""
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def __init__(self):
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super().__init__(name="word", kind="verbalize")
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chars = pynini.closure(DAMO_CHAR - " ", 1)
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char = pynutil.delete("name:") + delete_space + pynutil.delete("\"") + chars + pynutil.delete("\"")
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graph = char @ pynini.cdrewrite(pynini.cross(u"\u00A0", " "), "", "", DAMO_SIGMA)
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self.fst = graph.optimize()
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