first commit for takway.ai

fun_text_processing/text_normalization/ru/verbalizers/time.py

@@ -0,0 +1,51 @@
+import pynini
+from fun_text_processing.text_normalization.en.graph_utils import (
+    DAMO_NOT_QUOTE,
+    GraphFst,
+    delete_space,
+    insert_space,
+)
+from pynini.lib import pynutil
+
+
+class TimeFst(GraphFst):
+    """
+    Finite state transducer for verbalizing electronic
+        e.g. time { hours: "два часа пятнадцать минут" } -> "два часа пятнадцать минут"
+
+    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="time", kind="verbalize", deterministic=deterministic)
+
+        hour = (
+            pynutil.delete("hours:")
+            + delete_space
+            + pynutil.delete('"')
+            + pynini.closure(DAMO_NOT_QUOTE, 1)
+            + pynutil.delete('"')
+        )
+        minutes = (
+            pynutil.delete("minutes:")
+            + delete_space
+            + pynutil.delete('"')
+            + pynini.closure(DAMO_NOT_QUOTE, 1)
+            + pynutil.delete('"')
+        )
+
+        self.graph = (
+            hour
+            + delete_space
+            + insert_space
+            + minutes
+            + delete_space
+            + pynutil.delete("preserve_order: true")
+        )
+        self.graph |= hour + delete_space
+        self.graph |= minutes + delete_space + insert_space + hour + delete_space
+
+        delete_tokens = self.delete_tokens(self.graph)
+        self.fst = delete_tokens.optimize()