warmup_02.py

from time import time

test_range = range(100, 146511209)
power_ref = {n: {i: i**n for i in range(1,10)} for n in range(2,10)}

def is_narcissistic(x):
    string = str(x)
    digits = sorted([int(i) for i in string if i != '0'], reverse=True)
    digit_counts = {i: digits.count(i) for i in set(digits)}
    n = len(string)
    sum = 0

    for digit, count in digit_counts.items():
        sum += count*power_ref[n][digit]
        if sum > x:
            return False

    return sum == x

start = time()
for i in test_range:
    if is_narcissistic(i):
        print("[{:8.3f}] {}".format(time() - start, i))

Elegant way to generate the precomputed powers!