For security reasons, we saddly cannot allow you to create External Methods on Objectis. An External Method is trusted code, so it can do whatever it wants, including acting on other sites of the same instance, or even running Unix commands on the server...
i have to use the urllib.py library for my scripts at webonim.objectis.net if i am not allowed to create external methods than could you tell me how i can use that libary as it is not allowed to be imported directly