first commit for takway.ai

fun_text_processing/text_normalization/ru/verbalizers/telephone.py

@@ -0,0 +1,26 @@
+import pynini
+from fun_text_processing.text_normalization.en.graph_utils import GraphFst
+from fun_text_processing.text_normalization.ru.alphabet import RU_ALPHA
+from pynini.lib import pynutil
+
+
+class TelephoneFst(GraphFst):
+    """
+    Finite state transducer for verbalizing telephone, e.g.
+        telephone { number_part: "восемь девятьсот тринадцать девятьсот восемьдесят три пятьдесят шесть ноль один" } -> "восемь девятьсот тринадцать девятьсот восемьдесят три пятьдесят шесть ноль один"
+
+    Args:
+        deterministic: if True will provide a single transduction option,
+            for False multiple transduction are generated (used for audio-based normalization)
+    """
+
+    def __init__(self, deterministic: bool = True):
+        super().__init__(name="telephone", kind="verbalize", deterministic=deterministic)
+
+        graph = (
+            pynutil.delete('number_part: "')
+            + pynini.closure(RU_ALPHA | " ", 1)
+            + pynutil.delete('"')
+        )
+        delete_tokens = self.delete_tokens(graph)
+        self.fst = delete_tokens.optimize()