can you believe this?

crazy uses of list comprehension:

1.

def genSubRule(lol):
    opdict = {}
    for t in lol:
        minItem = sorted(t, key=lambda x: len(x))[0]
        for x in t:
            opdict[x] = minItem
    return opdict

genSubRule=lambda lol: {x: sorted(t, key=lambda x: len(x))[0] for t in lol for x in t}

2. world's fastest primility checker in one line python code

isPrime=lambda x: False if x<2 or x%2==0 else not any([x%i==0 for i in range(3,int(x**.5)+1,2)])