from pydantic import BaseModel

def to_camel(string: str) -> str:
    return ''.join(word.capitalize() for word in string.split('_'))

class Voice(BaseModel):
    name: str
    gender: str
    language_code: str

    class Config:
        alias_generator = to_camel

voice = Voice(Name='Filiz', Gender='Female', LanguageCode='tr-TR')
print(voice.language_code)
print(voice.dict(by_alias=True))

"""
tr-TR
{'Name': 'Filiz', 'Gender': 'Female', 'LanguageCode': 'tr-TR'}
"""