While reviewing a penetration testing script written in Python, you identify a function designed to process a list of hostnames and their associated services. The goal is to add a tuple containing a new hostname and service to the existing list, while ensuring that this addition is the last element and maintains the list's structure. Which of the following methods should you choose to accomplish this while adhering to best practices and considering performance?
Utilizing the insert() method, providing the index as the current list length for the host and service tuple
Using the append() method for the host and service tuple
Using the += operator to concatenate a new list with the host and service tuple
Expanding the list with extend() method using the host and service tuple
The correct answer is 'Using the append() method for the host and service tuple.' The append() method is the most appropriate for adding a single item to the end of a list. It is efficient because it modifies the list in-place. The extend() method is not appropriate because it is designed for adding all elements from an iterable, which would break each tuple into individual elements and add them separately if not used correctly. The += operator can also add a tuple to a list, but it's an overkill operation for adding a single element, as it's more commonly used for concatenating lists. The insert() method with the index at the end is not wrong but less efficient and more verbose than the append() method.
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