examples/advanced/many_validators.py
from __future__ import print_function

def is_big(x):
    return x > 100

def is_even(x):
    return not x % 2

numbers = [90, 102, 101, 104]

cond = [is_big, is_even]

z = filter( lambda n: all([f(n) for f in cond]),   numbers)
print(z) # [102, 104]