58 lines
1.9 KiB
Python
58 lines
1.9 KiB
Python
import pynini
|
|
from fun_text_processing.text_normalization.de.taggers.decimal import quantities
|
|
from fun_text_processing.text_normalization.en.graph_utils import (
|
|
DAMO_NOT_QUOTE,
|
|
GraphFst,
|
|
delete_preserve_order,
|
|
insert_space,
|
|
)
|
|
from pynini.lib import pynutil
|
|
|
|
|
|
class DecimalFst(GraphFst):
|
|
"""
|
|
Finite state transducer for classifying decimal, e.g.
|
|
decimal { negative: "true" integer_part: "elf" fractional_part: "vier null sechs" quantity: "billionen" } -> minus elf komma vier null sechs billionen
|
|
decimal { integer_part: "eins" quantity: "billion" } -> eins billion
|
|
|
|
"""
|
|
|
|
def __init__(self, deterministic: bool = True):
|
|
super().__init__(name="decimal", kind="classify", deterministic=deterministic)
|
|
|
|
delete_space = pynutil.delete(" ")
|
|
self.optional_sign = pynini.closure(
|
|
pynini.cross('negative: "true"', "minus ") + delete_space, 0, 1
|
|
)
|
|
self.integer = (
|
|
pynutil.delete('integer_part: "')
|
|
+ pynini.closure(DAMO_NOT_QUOTE, 1)
|
|
+ pynutil.delete('"')
|
|
)
|
|
self.fractional_default = (
|
|
pynutil.delete('fractional_part: "')
|
|
+ pynini.closure(DAMO_NOT_QUOTE, 1)
|
|
+ pynutil.delete('"')
|
|
)
|
|
|
|
self.fractional = pynutil.insert(" komma ") + self.fractional_default
|
|
|
|
self.quantity = (
|
|
delete_space
|
|
+ insert_space
|
|
+ pynutil.delete('quantity: "')
|
|
+ quantities
|
|
+ pynutil.delete('"')
|
|
)
|
|
self.optional_quantity = pynini.closure(self.quantity, 0, 1)
|
|
|
|
graph = self.optional_sign + (
|
|
self.integer + self.quantity
|
|
| self.integer + delete_space + self.fractional + self.optional_quantity
|
|
)
|
|
|
|
self.numbers = graph
|
|
graph += delete_preserve_order
|
|
delete_tokens = self.delete_tokens(graph)
|
|
self.fst = delete_tokens.optimize()
|