Sort a Tuple by its Float element

Sort a Tuple by its Float element.
Sample data:
[(‘item1’, ‘12.20’), (‘item2’, ‘15.10’), (‘item3’, ‘24.5’)]
prices = [
    ('item1', '12.20'),
    ('item2', '15.10'),
    ('item3', '24.5'),
    ]
print(sorted(prices, key = lambda x: float(x[1]), reverse=True))

Output:

[
  ('item3', '24.5'),
  ('item2', '15.10'),
  ('item1', '12.20')
]