将对象中的空字符串和列表属性替换为null

def replace_empty(obj):
    if isinstance(obj, dict):
        for key, value in obj.items():
            if isinstance(value, str) and value == "":
                obj[key] = None
            elif isinstance(value, list) and len(value) == 0:
                obj[key] = None
            elif isinstance(value, (dict, list)):
                replace_empty(value)
    elif isinstance(obj, list):
        for i in range(len(obj)):
            if isinstance(obj[i], str) and obj[i] == "":
                obj[i] = None
            elif isinstance(obj[i], list) and len(obj[i]) == 0:
                obj[i] = None
            elif isinstance(obj[i], (dict, list)):
                replace_empty(obj[i])
    return obj