The lambda expression allows you to define a function without the def statement:
:::python
names = ['Ada', 'Bob', 'Charlotte', 'Dave', 'Eddy']
# find words with an odd/even number of characters
odd = lambda s:len(s) % 2
even = lambda s:not odd(s)
print('odd :', [x for x in names if odd(x)])
print('even:', [x for x in names if even(x)])
The advantage of lambda is that it can be combined with other functional expressions like map(), filter() and reduce():
:::python
odd_names = list(filter(lambda s:len(s) % 2, names))
Excessive use of lambda does not necessarily make your code more clean.
But if you would like to experiment with functional programming it is worth to know.