#318 Use lambda as sorting key in python

One of the most common situations where a lambda comes in handy is when specifying a key function, which is a callable that returns the part of a collection or object that should be used for sorting.

forces = [
(385364, 188.2),
(385365, 306.2),
(385366, 402.4),
(385367, 128.6),
(385368, 174.5)
]
by_force_value = sorted(forces, key=lambda x: x[1], reverse=True)
print(by_force_value)

Output:

[(385366, 402.4), (385365, 306.2), (385364, 188.2), (385368, 174.5), (385367, 128.6)]