如何使用python中的argparse函数将可选参数传递给python类

import argparse

class MyClass:
    def __init__(self, param1, param2=None):
        self.param1 = param1
        self.param2 = param2

    def display(self):
        print(f"param1: {self.param1}, param2: {self.param2}")

def main():
    parser = argparse.ArgumentParser(description="A simple program to demonstrate argparse.")
    parser.add_argument('param1', type=str, help='The first required parameter.')
    parser.add_argument('--param2', type=str, help='An optional parameter.')

    args = parser.parse_args()

    # 创建 MyClass 实例，并传递解析后的参数
    my_class_instance = MyClass(args.param1, args.param2)
    my_class_instance.display()

if __name__ == "__main__":
    main()

python my_script.py value1 --param2 value2

param1: value1, param2: value2