Given a list of friends how many pairs can be formed? #Python's itertools.combinations is your friend:
>>> friends = 'bob tim julian fred'.split()
>>> list(itertools.combinations(friends, 2))
[('bob', 'tim'), ('bob', 'julian'), ('bob', 'fred'), ('tim', 'julian'), ('tim', 'fred'), ('julian', 'fred')]
Bite 107. Filter numbers with a list comprehension
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Complete the function below that receives a list of numbers and returns only the even numbers that are > 0 and even (divisible by 2).
The challenge here is to use Python's elegant list comprehension feature to return this with one line of code (while writing readable code).
