First example works fine in both Python 2 and 3. Second example works in Python 2.7 and earlier, but tuple unpacking for arguments was removed in Python 3. [1]

First example works fine in both Python 2 and 3. Second example works in Python 2.7 and earlier, but tuple unpacking for arguments was removed in Python 3. [1] [1] https://www.python.org/dev/peps/pep-3113/ https://www.python.org/dev/peps/pep-3113/