Kuidas erinevad Pythonis listide Append ja Extend meetodid nende eesmärgi ja käitumise poolest?

In Python lists, the methods append and extend are used to add elements, but they work differently:

• append(obj) adds a single object to the end of the list as one element.

• extend(iterable) expands the list by adding each element from the given iterable object separately.

Example:

lst = [1, 2, 3]
lst.append([4, 5])  # lst becomes [1, 2, 3, [4, 5]]
lst.extend([6, 7])   # lst becomes [1, 2, 3, [4, 5], 6, 7]

Thus, append adds the entire element as a whole, while extend unpacks the iterable object and adds its elements separately.