en_us_normalization.production.verbalize.OrdinalFst
- class en_us_normalization.production.verbalize.OrdinalFst(cardinal: Optional[CardinalFst] = None)[source]
Finite state transducer for verbalizing ordinal. It pretty much reuses verbalization from cardinal, rewriting last word or only ending of it. If number ends with 1-9 or 12, the whole last word has to be modified. This is done using mapping from files:
ordinals/digit.tsv
ordinals/teen.tsv
For others, grammar just appends “th” or rewrites “ty” to “tieth”.
Examples of input/output strings:
ordinal|order:13| -> thirteenth
ordinal|order:21| -> twenty first
- __init__(cardinal: Optional[CardinalFst] = None)[source]
constructor of ordinal verbalization transducer
- Parameters
- cardinal: CardinalFst
reusing cardinal to expand numbers to words.