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@PythonPr The image is 4.
numbers = [1, 2, 3]: A list is created with 3 elements.
numbers.append(4): The value 4 is added to the end of the list. The list is now [1, 2, 3, 4].
print(len(numbers)): The len() function counts the number of items in the list, which is now 4.
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