class ExecUtil:
    tmpMap = {}

    @classmethod
    def exec_code(cls, function_str, call_str, param_dict):
        """
        动态执行函数,必须按照示例的函数传入，设计到提取函数方法和参数
        :param function_str: 函数代码
        :param call_str:
        :param param_dict: 入参
        :return:
        """
        result = {}
        tmp_key = "tmp_result_625d7c4c3daa411f9cf8b14441e65539"
        function_str += f"\n{tmp_key}['res']={call_str}"
        if function_str in cls.tmpMap:
            cmp_code = cls.tmpMap[function_str]
        else:
            cmp_code = compile(function_str, '', 'exec')
            cls.tmpMap[function_str] = cmp_code
        exec(cmp_code, {}, {**param_dict, tmp_key: result})
        return result['res']


# cmd_str = """
# def factorial(num):
#     fact=1
#     for i in range(1,num+1):
#         fact = fact*i
#     return fact
# """
#
# start = time.time()
# for x in range(10000):
#     ExecUtil.exec_code(cmd_str, 'factorial(num)', {"num": 3})
# print(time.time() - start)


class User:
    def __init__(self):
        self.dic = {}
        self.a = 0

    def test1(self, b):
        print(ExecUtil.exec_code("""

def test2(self, b):
    import time
    print(time.time())
    self.dic['c'] = b+1
    self.a = b
    return b+2
    """, "test2(self, b)", {"self": self, "b": b}))


user = User()
user.test1(3)
print(user.dic)