Learn Python by Building Data Science Applications

Legacy formatting

Lastly, we want to show a legacy way to format, which uses percentage symbols. This approach predates Python 3. Don't use it—just be aware that it exists and can be seen in some old code bases. There is nothing particularly wrong with this approach, of course, but it is considered a legacy. Subjectively, we think that it is less readable, but that is our personal view:

>>> name = 'David'>>> print('Hello mr. %s' % name)Hello mr. David