“Subscriptable” is just a fancy way of saying "something you can use square brackets on to get parts from it.” For example, my_list accesses the element at 0 and key, respectively. In Python you can only use square brackets [] to access elements of a list, array, or dictionary. If you try to do the same thing with a function, you get the “function object is not subscriptable” error.

The IndexError: list index out of range error occurs in Python when an item from a list is attempted to be accessed that is outside the index range of the list. The range of a list in Python is , where n is the number of elements in the list.

The error “Client network socket disconnected before secure TLS connection was established” indicates something went wrong when setting up a secure connection with the server you’re communicating with. This can happen because of an unstable internet connection, wrong security settings on the server, or things like firewalls getting in the way.

The Java error “Could not find or load main class” is thrown when the JVM fails to find or load the main class while executing a program. This is often due to simple mistakes like typing the wrong class name or having the class file in the wrong place. It usually occurs when executing a Java program from the command line. Install the Rollbar Java SDK to identify and fix these errors.