# modified from https://github.com/feng-yufei/shared_debugging_code/blob/main/text_processing/symbols.py
PAD = "_"
PUNCTUATION = ';:,.!?¡¿—…"«»“” '
LETTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
IPA_LETTERS = "ɑɐɒæɓʙβɔɕçɗɖðʤəɘɚɛɜɝɞɟʄɡɠɢʛɦɧħɥʜɨɪʝɭɬɫɮʟɱɯɰŋɳɲɴøɵɸθœɶʘɹɺɾɻʀʁɽʂʃʈʧʉʊʋⱱʌɣɤʍχʎʏʑʐʒʔʡʕʢǀǁǂǃˈˌːˑʼʴʰʱʲʷˠˤ˞↓↑→↗↘'̩'ᵻ"
SYMBOLS = [PAD] + list(PUNCTUATION) + list(LETTERS) + list(IPA_LETTERS)
SPACE_ID = SYMBOLS.index(" ")
SYMBOL_TO_ID = {s: i for i, s in enumerate(SYMBOLS)}
ID_TO_SYMBOL = {i: s for i, s in enumerate(SYMBOLS)}