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'}
 """