[Python-ideas] custom predicate for all() & any()

[INADA Naoki]

>
>
> ## Example 1
>
>     ages = [21, 13, 18]
>     major = 18..__le__
>
>     allowed = all(ages, major)
>
>
allowed = all(18 <= a for a in ages)


> ## Example 2
>
>     people = [
>         {"name": "Mike", "age": 42},
>         {"name": "Josh", "age": 17}
>     ]
>     major = 18..__le__
>
>     allowed = all(people, {"age": major})
>

allowed = all(18 <= p['age'] for p in people)
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