'''
Defines the set of symbols used in text input to the model.

The default is a set of ASCII characters that works well for English or text 
that has been run through Unidecode. For other data, you can modify _characters. 
See TRAINING_DATA.md for details.
'''
from .cmudict import valid_symbols

_pad = '_'
_eos = '~'
_characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz!\'(),-.:;? '

# Prepend "@" to ARPAbet symbols to ensure uniqueness (some are the same as uppercase letters):
_arpabet = ['@' + s for s in valid_symbols]

# Export all symbols:
symbols = [_pad, _eos] + list(_characters) + _arpabet
