import tiktoken
import json

def count_tokens(string: str, encoding_name: str) -> int:
    """Returns the number of tokens in a text string."""
    encoding = tiktoken.encoding_for_model(encoding_name)
    num_tokens = len(encoding.encode(string))
    return num_tokens

def load_json(json_file):
    with open(json_file) as f:
        return json.load(f)