如何使用python编写验证器方法来验证json元素数据

import json

def validate_json(json_data, validation_rules):
    # 解析JSON数据
    try:
        data = json.loads(json_data)
    except json.JSONDecodeError:
        return False
    
    # 遍历验证规则
    for key, value in validation_rules.items():
        # 检查JSON数据中是否存在验证规则中定义的键
        if key not in data:
            return False
        
        # 检查键对应的值是否满足验证规则中定义的条件
        if not isinstance(data[key], value['type']):
            return False
        if 'min_length' in value and len(data[key]) < value['min_length']:
            return False
        if 'max_length' in value and len(data[key]) > value['max_length']:
            return False
        if 'allowed_values' in value and data[key] not in value['allowed_values']:
            return False
    
    return True

json_data = '''
{
    "name": "John Doe",
    "age": 25,
    "email": "johndoe@example.com"
}
'''

validation_rules = {
    "name": {
        "type": str,
        "min_length": 1,
        "max_length": 100
    },
    "age": {
        "type": int
    },
    "email": {
        "type": str,
        "allowed_values": ["johndoe@example.com", "janedoe@example.com"]
    }
}

result = validate_json(json_data, validation_rules)
print(result)