human
I wrote the below code

    if (bits < 1024):
        raise ValueError('RSA    modulus    length    must    be    >=    1024')
    if (((e % 2) == 0) or (e < 3)):
        raise ValueError('RSA    public    exponent    must    be    a    positive,    odd    integer    larger    than    2.')
    if (randfunc is None):
        randfunc = Random.get_random_bytes
    d = n = Integer(1)
    e = Integer(e)
    while ((n.size_in_bits() != bits) and (d < (1 << (bits // 2)))):
        size_q = (bits // 2)
        size_p = (bits - size_q)
        min_p = min_q = (Integer(1) << ((2 * size_q) - 1)).sqrt()
        if (size_q != size_p):
            min_p = (Integer(1) << ((2 * size_p) - 1)).sqrt()
        def filter_p(candidate):
            return ((candidate > min_p) and ((candidate - 1).gcd(e) == 1))
        p = generate_probable_prime(exact_bits=size_p, randfunc=randfunc, prime_filter=filter_p)
        min_distance = (Integer(1) << ((bits // 2) - 100))
        def filter_q(candidate):
            return ((candidate > min_q) and ((candidate - 1).gcd(e) == 1) and (abs((candidate - p)) > min_distance))
        q = generate_probable_prime(exact_bits=size_q, randfunc=randfunc, prime_filter=filter_q)
        n = (p * q)
        lcm = (p - 1).lcm((q - 1))
        d = e.inverse(lcm)
    if (p > q):
        (p, q) = (q, p)
    u = p.inverse(q)
    return RsaKey(n=n, e=e, d=d, p=p, q=q, u=u)

What's a good function header?
 ... Here's a good function header?
assistant
#Here's a good function header.

def generate(bits, randfunc=None, e=65537):