如何使用subprocess模块​​执行__name __ =='__main__'*以下的python代码?

我有一个形式的python脚本

...
if __name__=='__main__':
   parser = argparse.ArgumentParser()
   #code

From another python script, how can I execute the code below __name__ == '__main__' without using the subprocess module?

[Edit] In addition, my python script takes input parameters with the argparse module. I also need to pass parameters when executing the code below the __name__ part.