Constructs a `OpenAIGPTConfig` from a Python dictionary of parameters.

def from_dict(cls, json_object):
        """Constructs a `OpenAIGPTConfig` from a Python dictionary of parameters."""
        config = OpenAIGPTConfig(vocab_size_or_config_json_file=-1)
        for key, value in json_object.items():
            config.__dict__[key] = value
        return config